Yep. Guess you weren’t into blogs much in their heyday?
Back before FB sucked the life out of blogs, I often had 50 comment plus discussions on my blog with regulars and this would happen sometimes. It’s hard to impersonate another poster without knowing their email since that’s the field that determines the user image, but some tried.
There was one notorious sockpuppet in particular that I remember from 2007 who kept trying to pretend to be new users who agreed with his primary identity. Wordpress logs the IP and some other information along with comments much like Wikipedia does though, so it’s not too hard to tell. Ultimately, just holding the first comment from a new email address was enough to eliminate all the problematic commenters I ever encountered.
