You dont give up your rights at all. Sorry, I should not have said 'it becomes public domain' but rather 'it might as well become public domain' Public... Your work isnt being hung in a gallery with a pricetag and guards and security. You posted it for people to see and are not charging a fee. ...You should not be surprised this happenes. Since your work is public (the instant you post it) and by virtue of being aware it can be copied freely, you might as well give permission to do so because people will. Now people who sell same, well that's just wrong. It's alot like an EULA. Sometimes all it takes is to break a seal to wave your rights or click a check box or install a program. When you post, you are almost doing the same thing. The problem is, nobody cares! The image is online and if its online its free for the taking. Thats the point. It's really just a matter of what you are willing to deal with when you post anything online. Words, ideas, pictures, video, audio... Thats a fact of the web. It's too bad but its reality. allwhois.com is your friend. Use it. Abuse it. Teach those who steal your work a lesson... Or discuss and complain about it here and wait and hope someone else will do something about it, whatever works... ;)