Wiktionary:Vandalism

Vandalism is deliberate disruption of Wiktionary. Users who are clearly vandalizing should be blocked from editing to prevent any further time being wasted by them.

Edits and pages which clearly have nothing to do with Wiktionary’s purpose or practices will be undone or removed at the first opportunity, at the discretion of the administrators.

Not all disruptive edits will be intentionally so, and users who are disrupting Wiktionary unintentionally should not be blocked unless it becomes clear that they have no intention of changing their ways and becoming constructive. A reasonable effort should be made to communicate with such users before they are blocked.

All edits deemed unacceptable, either good faith or bad faith, may be rolled back.

• Vandalism in progress (WT:VIP) to report current or very recent vandalism so that it can be dealt with by an admin.
• Help:Patrolled edits, a guide to admins on how to patrol edits, includes some relevant stuff.
• Blocking policy (WT:BLOCK), for policy relating to blocking.