*sigh* ... Thanks a lot This kind of behaviour makes me feel so sick. Hopefully, I did not face this situation a lot, but still, this is rude indeed. I wonder whether I should finally add a huge watermark on my art :-/
Like you said, at least they don't sell it !
Thanks a again for letting me know, I sent a delete request.
That's what I started doing, along with removing the share functions from my art and making them all only available for logged-in members. deviantART seems to just be "free pretty pictures!" to most people. I noticed that the minute I started putting big ugly watermarks with "do not repost" in them on everything I posted on dA, I stopped finding my art reposted other places. It also helps to post images as small as you can stand to, because if it's tiny it won't be any use for someone's cut-and-paste project.
It's a super terrible thing to have to deal with. People are big jerks. I'm glad I could help.