I personally find this hilarious. It may be slightly wrong of the audience, but it's still hilarious. You'd think for how many great bands out there these days they could get better opening acts? Even decent ones would be nice, though I would've rather had Trivium than BFMV
The real reason I find it hilarious is the "death to false metal" bit, since I have a friend that shouts that at gigs all the time, and now I do too.