With the recent small rash of vandalism here, I thought that it would be a good time to give some tips about spotting vandalism and how to stop it.
It is recommended that users check edits made by anonymous users, as they are the most likely to be vandalism. That being said, not all anonymous users are vandals.
If you find vandalism you should undo it immediately. When you find someone who is spamming or vandalizing the wiki you should report them to an admin, so that they can prevent them from continuing to vandalize the wiki. Do not leave a message on the vandal's talkpage, as it just encourages them.
These are some active admins that you can contact about vandals.