Some are polite and good about taking stuff down because they just didn't know they shouldn't be using it. I have some really good online friends who I met because they reposted photos.

Some respond by cursing me/the universe out and posting threats of violence while declaring their right to use anything they find on the Internet, in a gross misunderstanding of "public domain". For those, I hit them with words. Lots and lots of lovely words.

(Not for their sake, but for anyone reading their rants and not knowing what's really going on, because it helps other people to avoid making the same mistake their friend did)

People think I get all RAWR AM ANGRY over people reposting images, but I don't. It's just another thing to deal with. It takes something on the scale of, entering my photos into a contest (which happened last year) and the website running the contest refusing to remove them, to get me actually mad.