I've been notified that someone on Facebook has uploaded my Sangheili Husk pic ([link], using it as an avatar image it looks like. He (I think it's a he) didn't remove the copyright stuff on the image, but it's still not cool to use my work without permission. However, I don't have a Facebook account to tell this guy that myself, nor do I want to go through the trouble of setting up an account to do just that (I don't trust Facebook).
I can report him without an account, but to do that, Facebook requires my Full Name, Mailing Address, and Phone number in the report. On top of that, they may give that information to the person I am reporting! Um...not just no...but FUCK NO! There's a reason I don't have my full real name publicly displayed (if I can help it): there's too many creeps, assholes, etc out there (and I don't trust Facebook): I'd rather not open myself up to harassment or worse.
On top of that, Facebook probably won't do anything anyway since it's Fanart...and Fanart doesn't have as much legal protection (if any) as original works (cause, you know, it's all technically illegal and IP holders largely just tolerate it).
So, sadly, I don't consider it worth it to go after this guy for this (that said, don't go attacking him if you find out who he is). If it was one of my original creations like my Lipors or Mukata, then yes, I would bite the bullet and go after him. But for fanart? Not worth it, especially since this is on Facebook (did I mention I don't trust Facebook?).