Copyright ownership is one thing... I think that means that reproducing the comment elsewhere (in the "Best Disqus Comments EVAR Book of 2009" for example) would require permissin from the commenter.<p>But while you have rights to the creative work of the comment, I think the UGC site in question (whether it's Digg or Reddit) has the right to remove it or futz with it at will.<p>If I put a whiteboard outside and you draw a picture on it, it seems pretty ridiculous to think that you have the right to get upset if I erase it or even change it (or allow other people to erase it or change it). Of course, if I copied it, framed it, and sold it in a gallery...