I've looked at the list of questions which have this tag(331 at the moment) and from my point of view this tag should be removed(or maybe even blacklisted). A decent number of those questions are already closed as offtopic and the vast majority which are still open should be closed(as being offtopic) as they generally ask for legal advice. Just a few examples:
How can I change the copyright template in Xcode 4? (like another small number of questions tagged with copyright, the tag isn't really necessary)
Blacklisting this tag might(well, I don't know if this will really happen) even discourage future users on asking offtopic questions related to copyright issues on stackoverflow.