User blog comment:The Ultimate Thinker/How to catch a Sock Puppet?/@comment-961279-20140823073323/@comment-961279-20140823172536

I'll add another one because it's happening on a wiki right now. A returning vandal will often go back and re-vandalize the same pages. If you see a new account or IP going back to the same group of pages as a known vandal, it's probably the same person. This is especially true if those pages are not listed on the Wikia Activity or Recent Changes pages, so it's less likely to be a coincidence as opposed to deliberate vandalism.