Viewing abuse filter 9: Section blanking

Filter parameters

Filter ID:	9
Description: (publicly viewable)
Conditions:	!"confirmed" in user_groups & length(added_lines) < 1 & page_namespace == 0 & ( ( rmwhitespace(removed_lines) rlike "==\w+==" & ( rmwhitespace(old_wikitext) contains rmwhitespace(removed_lines + "==") & ! rmwhitespace(new_wikitext) contains rmwhitespace(removed_lines + "==") ) ) \| ( rmwhitespace(old_wikitext) contains rmwhitespace("==" + removed_lines + "==") & ! rmwhitespace(new_wikitext) contains rmwhitespace(removed_lines + "==") ) ) !"confirmed" in user_groups & length(added_lines) < 1 & page_namespace == 0 & ( ( rmwhitespace(removed_lines) rlike "==\w+==" & ( rmwhitespace(old_wikitext) contains rmwhitespace(removed_lines + "==") & ! rmwhitespace(new_wikitext) contains rmwhitespace(removed_lines + "==") ) ) \| ( rmwhitespace(old_wikitext) contains rmwhitespace("==" + removed_lines + "==") & ! rmwhitespace(new_wikitext) contains rmwhitespace(removed_lines + "==") ) )
Notes:	Original from Wikipedia (https://en.wikipedia.org/wiki/Special:AbuseFilter/172) This seems to work to see section blanking, testing as log only to see if it gives false positives and for speed. OK, added basic check if the removed_text does contain "==", this line could maybe be made better by using a regex on it to check if it is "== sectiontitle ==" ..?? Reenabled, it still may give some false positives. --Beetstra Speedup, specificity --Beetstra bit upgrade? --Beetstra Small case tag, for consistency with other tags. -x null edit, small case change didn't get through - Cen trying to deactivate and reactivate - Cen tagged edits are not reassigned after rename, see bugzilla 18908 - Cen (added_lines == "") does not work, (length(added_lines) < 1) does .. curiously. Updating filter --Beetstra False positives on removing empty sections can we test for that? Crudely even old_wikitext contains [^=](==+) *\n\1[^=] (i.e. it had at least one empty section) might do the job. Rich Farmbrough. Encountered another form of blanking, attempted to add to filter --Beetstra Format. -DF
Flags:	Hide details of this filter from public view Enable this filter Mark as deleted
Filter last modified:	12:07, 12 August 2025 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\nlength(added_lines) \u003C 1 \u0026\r\npage_namespace == 0 \u0026\r\n(\r\n (\r\n rmwhitespace(removed_lines) rlike \"==\\w+==\" \u0026\r\n (\r\n rmwhitespace(old_wikitext) contains rmwhitespace(removed_lines + \"==\") \u0026\r\n ! rmwhitespace(new_wikitext) contains rmwhitespace(removed_lines + \"==\") \r\n )\r\n ) \| \r\n (\r\n rmwhitespace(old_wikitext) contains rmwhitespace(\"==\" + removed_lines + \"==\") \u0026\r\n ! rmwhitespace(new_wikitext) contains rmwhitespace(removed_lines + \"==\")\r\n )\r\n)","name":"Section blanking","comments":"Original from Wikipedia (https://en.wikipedia.org/wiki/Special:AbuseFilter/172)\r\n\r\nThis seems to work to see section blanking, testing as log only to see if it gives false positives and for speed.\r\n\r\nOK, added basic check if the removed_text does contain \"==\", this line could maybe be made better by using a regex on it to check if it is \"== sectiontitle ==\" ..??\r\n\r\nReenabled, it still may give some false positives. --Beetstra\r\n\r\nSpeedup, specificity --Beetstra\r\nbit upgrade? --Beetstra\r\n\r\nSmall case tag, for consistency with other tags. -x\r\n\r\nnull edit, small case change didn't get through - Cen\r\n\r\ntrying to deactivate and reactivate - Cen\r\n\r\ntagged edits are not reassigned after rename, see bugzilla 18908 - Cen\r\n\r\n(added_lines == \"\") does not work, (length(added_lines) \u003C 1) does .. curiously.\r\n\r\nUpdating filter --Beetstra\r\nFalse positives on removing empty sections can we test for that? Crudely even\r\nold_wikitext contains [^=](==+) *\\n\\1[^=]\r\n(i.e. it had at least one empty section) might do the job.\r\nRich Farmbrough.\r\n\r\nEncountered another form of blanking, attempted to add to filter --Beetstra\r\n\r\nFormat. -DF","group":"default","actions":{"tag":["Section blanking"]},"enabled":true,"deleted":false,"privacylevel":0,"global":false},"actions":{"tag":["Section blanking"]}}

Actions to take when matched

Trigger actions only if the user trips a rate limit

Number of actions to allow:

Period of time (in seconds):

Group throttle by:

user

See the documentation on mediawiki.org.

Trigger these actions after giving the user a warning

System message to use for warning:

Page name of other message:

(without "MediaWiki:" prefix)

Prevent the user from performing the action in question

System message to use for disallowing:

Page name of other message:

(without "MediaWiki:" prefix)

Revoke the user's autoconfirmed status

Block the user and/or IP address from editing

Block the user and/or IP address from editing their own talk page

Block duration for non-registered users:

Block duration for registered users:

Tag the edit for further review

Tags to apply:

Section blanking