I'm not sure this is the kind of PR that SOPA opponents need right now. I'm not saying that attacking UM website is good or bad, but the timing is certainly awkward imho.
EDIT: I don't care about being downvoted, but I would like to know why anyone thinks this is a good idea? It accomplishes nothing and makes us look bad. I understand why people are upset, but this does not help.
I know they're not really doing anything harmful to the computers, but they're making us look like criminals.