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Avoidant vandalism Removing {{afd}},  and other related tags in order to conceal deletion candidates or avert deletion of such articles. Note that this is often mistakenly done by new users who are unfamiliar with *fD procedures and such users should be given the benefit of the doubt and pointed to the proper page to discuss the issue.
Changing people's comments Editing signed comments by another user to substantially change their meaning (e.g. turning someone's vote around), except when removing a personal attack (which is somewhat controversial in and of itself).  Signifying that a comment is unsigned is an exception. e.g. (unsigned comment from user)

Talk page vandalism Deleting the comments of other users from article Talk pages, aside from removal of internal spam, or deleting entire sections of talk pages, is generally considered vandalism. Removing personal attacks is often considered legitimate, and it is considered acceptable to archive an overly long Talk page to a separate file and then remove the text from the main Talk page.  The above does not apply to the user's own Talk page, where users generally are permitted to remove and archive comments at their discretion, except in cases of legitimate warnings, which they are generally prohibited from removing, especially where the intention of the removal is to mislead other editors.
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