That's awesome that your band is so successful! that is not awesome that the other band is a bunch of jerks. umm, well I'm sure you don't want my advice, because it would invlove some kind of revenge, and that could lead to legal lawsuits, which could put an end to your whole band's success. plus you sound like a really nice person, promoting other bands and whatnot, so you probably wouldn't be coldhearted enough to do it. so you're best bet is to go the police... no not the band from the 80s... yeah you know what I mean, I think.