Viewing abuse filter 4: New user blanking articles

Filter parameters

Filter ID:	4
Description: (publicly viewable)
Conditions:	!("confirmed" in user_groups) & page_namespace == 0 & ( new_size < 50 & old_size > 300 \| new_size/(old_size + 1) < 0.1 ) & !(lcase(new_wikitext) rlike "#\sredirect\|{{(?:db-(?:attack\|g10)\|wi\|wiktionary\sredirect)\s[\|}]") & !(summary irlike "^(?:revert\|rv\|undid)") !("confirmed" in user_groups) & page_namespace == 0 & ( new_size < 50 & old_size > 300 \| new_size/(old_size + 1) < 0.1 ) & !(lcase(new_wikitext) rlike "#\sredirect\|{{(?:db-(?:attack\|g10)\|wi\|wiktionary\sredirect)\s[\|}]") & !(summary irlike "^(?:revert\|rv\|undid)")
Notes:	Original from Wikipedia (https://en.wikipedia.org/wiki/Special:AbuseFilter/3) Should there be a note in the warning about what to do if you're a BLP subject attempting to blank your own article? Also, yay, first comment! - east These notes are not private, by the way. The false positives page has not been created yet, so the warning page is incomplete. I deactivated the action 'warn'. Re-enabled after creating it -- Andrew We really need a better way to talk. Do tildes work here? ~~~ (east) Guess not :'( Ignore if editor is the only editor of the page (faked by checking last 10 editors) Redefine blanking as any size under 50, where the page started at >500 (min delta of 450) Logic fixes, some of the conditions were redundant - Hersfold Note that filter applies only to new users. (eg non autoconfirmed but new user is shorter) Optimizing - Hersfold Add redirect avoidance, necessary if this is going to allow pages to not be fully blank. - DF changed "user_name in article_recent_contributors" to "!(user_name in article_recent_contributors)" - Hersfold Adding & !(user_name == 69.226.103.13) to temporarily exempt that IP address from this filter, see my talk page for details. - Hersfold Scratch that, removing per Prodego's comments on filter 30. If it got removed there, I shouldn't be adding it here. - Hersfold I added an exception for {{db-attack}} template. - Ruslik I added an exception for {{db-g10}} template. - Od Mishehu Optimization of the code. - Ruslik Moved new size check before namespace check - rationale very few edits result in size < 50, most are to namespace 0. Moved old size before namespace check - rationale _given_ new size< 50 very few edits will have oldsize > 500 (especially by new users), however most will be to mainspace. Previous to change average run time 6.52ms, 27 conditions. RF OK condition stats seem meaningless varying from 8 to 500 I'll review in 10,000 edits time. Run 5.97 conditions 14, but I don't trust them. RF. Now monitoring namespace 100 (portal) Shirik 12 Feb 2010 Optimize --Tim Adding Wiktionary template to prevent false positives. -v^_^v Optimize using regex. - KoH Portals are simply not worth the runtime. - KoH Temporarily adding the reference desks due to a persistent IP-hopping vandal. Will disable when it's over.--JD Was ultimately not needed. Removed.--JD Ugh, is that vandal watching this filter? --JD The vandal seems to have again stopped blanking. If (s)he resumes, re-add the condition. --JD Vandal is back. Will leave on longer. --JD Removing now. Sorry for the comment/log spam here. --JD Decrease old_size restriction to > 300 to pick up what few edits Filter 344 catched that this one did not. ~ MusikAnimal 2014.09.25 Reorder to reduce conditions. -DF Set to disallow per [[Special:PermaLink/878875898#Setting filter 3 to warn and disallow?]] -Galo 2019.01.18 Temporary tag-only as removing check to "page_recent_contributors" - simultaneously significantly slows down the filter while causing many false negatives. Original purpose of that was to allow article creators to blank their own pages, but since ACTPERM there should be basically no non-autoconfirmed users who have articles. Also allow spaces in redirect. -Galo 2019.01.22 Back to disallow. -Galo 2019.01.22 Add cases where content is reduced to a tenth of its size; this is same as what MediaWiki tags as "replaced". All vandalism when looking at non-(auto)confirmed users. -G 2019-03-04 Check new_wikitext instead of added_lines, per false positives relating to substantial pages already being a redirect. -G 2019-03-11 +Exception for {{wiktionary redirect}} per FP. -G 2019-06-07 Tweak template regex. -G 2019-06-17 Exclude reverts, so IPs can undo large copy-paste vandalism (e.g. [[Special:AbuseLog/33169923]]). Surprisingly, no false negatives in the last 1000 hits. --Suffusion of Yellow 23:02 15 Aug 2022
Flags:	Hide details of this filter from public view Enable this filter Mark as deleted
Filter last modified:	02:57, 12 February 2026 by Sammyrms1 (talk \| contribs)
History:	View this filter's history
Tools:	Export this filter to another wiki {"data":{"rules":"!(\"confirmed\" in user_groups) \u0026\r\npage_namespace == 0 \u0026\r\n(\r\n new_size \u003C 50 \u0026 old_size \u003E 300 \|\r\n new_size/(old_size + 1) \u003C 0.1\r\n) \u0026\r\n!(lcase(new_wikitext) rlike \"#\\sredirect\|{{(?:db-(?:attack\|g10)\|wi\|wiktionary\\sredirect)\\s*[\|}]\") \u0026\r\n!(summary irlike \"^(?:revert\|rv\|undid)\")","name":"New user blanking articles","comments":"Original from Wikipedia (https://en.wikipedia.org/wiki/Special:AbuseFilter/3)\r\n\r\nShould there be a note in the warning about what to do if you're a BLP subject attempting to blank your own article?\r\n\r\nAlso, yay, first comment! - east\r\n\r\nThese notes are not private, by the way.\r\n\r\nThe false positives page has not been created yet, so the warning page is incomplete. I deactivated the action 'warn'.\r\n\r\nRe-enabled after creating it -- Andrew\r\n\r\nWe really need a better way to talk. Do tildes work here? ~~~ (east)\r\nGuess not :'(\r\n\r\nIgnore if editor is the only editor of the page (faked by checking last 10 editors)\r\n\r\nRedefine blanking as any size under 50, where the page started at \u003E500 (min delta of 450)\r\n\r\nLogic fixes, some of the conditions were redundant - Hersfold\r\n\r\nNote that filter applies only to new users. (eg non autoconfirmed but new user is shorter)\r\n\r\nOptimizing - Hersfold\r\n\r\nAdd redirect avoidance, necessary if this is going to allow pages to not be fully blank. - DF\r\n\r\nchanged \"user_name in article_recent_contributors\" to \"!(user_name in article_recent_contributors)\" - Hersfold\r\n\r\nAdding \u0026 !(user_name == 69.226.103.13) to temporarily exempt that IP address from this filter, see my talk page for details. - Hersfold\r\nScratch that, removing per Prodego's comments on filter 30. If it got removed there, I shouldn't be adding it here. - Hersfold\r\nI added an exception for {{db-attack}} template. - Ruslik\r\nI added an exception for {{db-g10}} template. - Od Mishehu\r\nOptimization of the code. - Ruslik\r\nMoved new size check before namespace check - rationale very few edits result in size \u003C 50, most are to namespace 0. Moved old size before namespace check - rationale _given_ new size\u003C 50 very few edits will have oldsize \u003E 500 (especially by new users), however most will be to mainspace. Previous to change average run time 6.52ms, 27 conditions. RF\r\nOK condition stats seem meaningless varying from 8 to 500 I'll review in 10,000 edits time.\r\nRun 5.97 conditions 14, but I don't trust them. RF.\r\n\r\nNow monitoring namespace 100 (portal) Shirik 12 Feb 2010\r\n\r\nOptimize --Tim\r\n\r\nAdding Wiktionary template to prevent false positives. -v^_^v\r\n\r\nOptimize using regex. - KoH\r\nPortals are simply not worth the runtime. - KoH\r\n\r\nTemporarily adding the reference desks due to a persistent IP-hopping vandal. Will disable when it's over.--JD\r\n\r\nWas ultimately not needed. Removed.--JD\r\n\r\nUgh, is that vandal watching this filter? --JD\r\n\r\nThe vandal seems to have again stopped blanking. If (s)he resumes, re-add the condition. --JD\r\n\r\nVandal is back. Will leave on longer. --JD\r\n\r\nRemoving now. Sorry for the comment/log spam here. --JD\r\n\r\nDecrease old_size restriction to \u003E 300 to pick up what few edits Filter 344 catched that this one did not. ~ MusikAnimal 2014.09.25\r\n\r\nReorder to reduce conditions. -DF\r\n\r\nSet to disallow per [[Special:PermaLink/878875898#Setting filter 3 to warn and disallow?]] -Galo 2019.01.18\r\n\r\nTemporary tag-only as removing check to \"page_recent_contributors\" - simultaneously significantly slows down the filter while causing many false negatives. Original purpose of that was to allow article creators to blank their own pages, but since ACTPERM there should be basically no non-autoconfirmed users who have articles. Also allow spaces in redirect. -Galo 2019.01.22\r\n\r\nBack to disallow. -Galo 2019.01.22\r\n\r\nAdd cases where content is reduced to a tenth of its size; this is same as what MediaWiki tags as \"replaced\". All vandalism when looking at non-(auto)confirmed users. -G 2019-03-04\r\n\r\nCheck new_wikitext instead of added_lines, per false positives relating to substantial pages already being a redirect. -G 2019-03-11\r\n\r\n+Exception for {{wiktionary redirect}} per FP. -G 2019-06-07\r\n\r\nTweak template regex. -G 2019-06-17\r\n\r\nExclude reverts, so IPs can undo large copy-paste vandalism (e.g. [[Special:AbuseLog/33169923]]). Surprisingly, no false negatives in the last 1000 hits. --Suffusion of Yellow 23:02 15 Aug 2022","group":"default","actions":{"disallow":["abusefilter-disallowed"]},"enabled":true,"deleted":false,"privacylevel":0,"global":false},"actions":{"disallow":["abusefilter-disallowed"]}}

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