I don't like art theft either. Sometimes I get confused on what art to use as backgrounds. Like if you look up "Magical Forest" on google it shows many pictures of forests and such. I get confused on which on to use because there is no copyright name to it.
That really didn't mean anything but I'm just saying... Meow.~
Anyways, if you do end up posting art, you should put your name on it, and when you post art you could put some rules down on rather or not the other people could use it, and how they could use it. I should start doing that myself. Maybe post it in my DA signature or something.
Anyways, if someone uses a picture, and it says they cannot use it. They should not use it.
On the other hand, if there is a picture that says nothing about other people use it, I think people should be able to use it as long as they give credit to the artist, to a link to the picture and inform the artist that you are using it, also give them a link to the place it is being used at. If the artist says to take the art down, then Take. It. Down. and inform them that you took it down.
What do you think about this? I mean, that's just my opinion. If this offends anyone I'm very sorry, I do not mean to offend anyone. Just stating my opinion. c: