That shit must be so frustrating. Even when they litterly say they've stolen it, they still get zapped. 😦

I've never zapped someone for posting someone else's shit like memes etc. I only zap original content. Even if it's just a clever quip.

Perhaps you should invest in some sort of gallery software to display your art, then link to the gallery rather than uploading to someone else's server. That way, you can control hot-linking and protect your IP.