01d74549_ikipedia_Vandalism___Wikipedia__Type
[Description] Adding profanity, graffiti, or patent nonsense to pages; creating nonsensical and obviously unencyclopedic pages, etc. However, the addition of random characters to pages is often characteristic of an editing test and, though impermissible, may not be malicious. [Type] 
Silly vandalism
Wikipedia:Vandalism - Wikipedia
Type