That's one of those stories that I just shake my head to.
The part about blaming metal, or music in general - that's just peoples way of placing blame on something, and it's just idiotic.
The actual act carried out - just another vision of why I sometimes hate being human. I see no point in it. If it was about puiblicity - dumb reason. If it was about increasing sales - dumb reason. I don't even know the band, but I'd be surprised if their merit was judged on their music alone. I don't think anybody true to their profession needs to stoop to such levels - unless they just plain suck at what they do, and they felt they needed some sort of jumpstart.