The definition of vandalism from the Wiktionary:
"Needless damage or destruction of property, usually someone else's property or common or shared property."
Vandalism in wikis
In terms of wikis, vandalism is adding any unwanted content to or removing any wanted content from the web site. Some vandalism is done by bots. Sneaky bot is a term for a "fake spam cleaner". This is a user who pretends to clean spam just to fool people into thinking the spam is removed when all they are doing is make a small edit or removing a few lines of spam.
- Violations list
- The Outward Wiki vandalism policy