Erase Errata who opened for Sonic Youth. Those bitches wouldn't stop playing. Then they stopped and came out again with Kim Gordon to play some more. I just about died and was ready to go up onstage and shove them all off. Sadly, for my sake, a lot of others liked them. I have no fucking clue why! They were God-awful.
Before I read anyone mention Dead Meadow, I myself was going to list them. UGH!!!!! It's bad enough that they can't play anything that resembles music but they turn it up so loud that your ears are burned out for the good stuff to follow.
Dead Meadow just opened for Super Furry Animals in Manchester about a week ago. Everyone absolutely hated them. You have no idea how embarrased that I was to have to admit that they are from DC. Someone told me that SFA requested them to support them. I'm assuming it's because SFA are guaranteed to sound great after that mess.