A couple of months ago, we had a problem with a company that reprinted our posts in full, surrounded by their ads. It was a drag, but it seemed to stop right after that post (but not before they mocked our outrage a bit).
I noticed this today on a post in my aggregator:
This Feed is for personal non-commercial use only. If you are not reading this material in your news aggregator, the site you are looking at is guilty of copyright infringement.
This guy must add that to every entry in his RSS feed to ensure that it shows up on any site that lifts his content directly from RSS. Interesting. Effective? I don’t know.