That band on that myspace you linked are absolutely TERRIBLE. They sound like every local band in my area that I've had the misfortune of seeing.
There is absolutely NOTHING redeeming about that song at all.
Did they REALLY think to themselves while playing those first few bars 'Yeah, this is good stuff!'? Even compared to the bands they're trying to be, it's still HORRIBLE.
They have no talent whatsoever, the song was bad enough, but it was made worse by the fact that they didn't seem to know how to play it. Their own song.
The question I'd ask myself is 'Do I really want my fans to be the same people who enjoy this crap?'.
The thing about your local scene is that YOU are a part of it, whether you're making music or not. There's more to your local music scene than the bands, if you don't like it, fix it. Maybe start a label, or make cool flyers for shows, start an interesting band that's a little different (not crap) and hope that others follow by trying to do their own thing. Try to encourage bands you know to develop actual personalities of their own.
Go to shows and heckle crap bands until they break up. No, I'm serious.
Spread horrible rumours about them, and make a really cool graphic for the band that you do like. Promote the good bands all over, ask your local indepedent to stock some of your local favourite acts. Just make sure everybody knows that the crap bands are crap.
It would be amazing if you guys would add more ideas to this. 'How to discredit a band that you don't like'.