Well, rippers have one bad habit, they keep ripping. So long as they keep ripping, doesn't matter what e-mail or ip they use on what site, because this will be a center with a lot of big graphic sites partnered with. So, even if they do know how to changer their ip (highly unlikely, seeing as they can't even be arsed to make their own artwork), then they will just get caught again, reported, and blacklisted. Rinse and repeat.