On Wikipedia, the definition of vandalism is editing a project in a malicious manner that is intentionally disruptive. Vandalism includes any addition, removal, or modification that is humorous, nonsensical, a hoax, or otherwise degrading.
By 'vandalising' a wikipedia page several times, a notification will pop up.
“Your edits continue to appear to constitute vandalism”
The notification regarding this kind of ‘misbehavior’ is displayed on a wall outside and the photo of the piece is uploaded on the vandalism page of wikipedia.
Duration: 3 days (online)