Alright, I recently saw a post of a tweet from one of the creators of the C&H comics about how he wouldn't care if Funnyjunks and 9gags admin jumped off a cliff, probably because of the "content stealing" that admin apparently intentionally does.
Also, when you google funnyjunk, the first thing that pops up is the site, but the second and third are articles about lawsuits due to content theft.
Just ban anyone who posts copyrighted content and doesn't source the original creator.
The creator of The Oatmeal comics said that what he really wanted were the comics removed that didn't give credit where it was due.
TL;DR ban people that post copyrighted content to avoid further conflict. Unless of course you're just trolling them, then keep going.