They're not the worst thing to ever happen to rock. Come the **** on. They're bland, sure, and maybe even a bit annoying, but saying that they're the single worst thing to ever happen to rock would be a bit over the top, especially when there are a few other bands that exist that would, easily, be bigger crimes against music than Tokio Hotel are.
People hate them because of their looks, THEN because of their music. It's never, *ever* the other way around.