Here is how you properly deal with art theft
You report the person.
And get the fuck over it.
If they are harassing you. There is this lovely feature called the block button.
You don't make a journal/deviantation saying URMEHGURD THIS PURSON TRACED/STURL MAH URT REPURT AND ATTACK AND URNWURCH THURM!!!!!!!!
I'm sure we've ALL been guilty of a bit of theft some point in our lives. There's always gonna be theft. And they're always gonna get caught sooner or later.
Seriously. Have you ever met a famous deviant that was an art theft?? (Besides trolls derp)
Calm yo titties guys. Lets all be big boys n girls and put on our manly pants.