So let me get this straight - people are freaking out over a little tits and ass on the stage at 2am, and are actually shocked and horrified, despite many years of precedent?
This is a festival which for the last several years has featured a multitude women in corsets and short skirts that are sometimes only centimeters from showing nipples and pussy, girls with their pants down to their hipbones with their thong straps prominently displayed, crotch-grinding, ass-grabbing, and breast-squeezing happening throughout the hallways all night long, a hotel party with a naked girl in the pool, a guitarist who performs with vibrators ... shit, Crooks and Lotesto could run their OWN adult expo on their own, the way those two carry on all weekend. Anyway, near-nudity and blatantly lewd behavior is practically a standard in the audience, and some of you are freaked out over a bit of b00bs? Fer the love of Fred almighty. Granted, there's a taste factor involved in which Damian kinda chose poorly, but the puritan reaction is pretty hypocritical, especially given the behavior I've seen some of the same people who are complaining indulge in.
If you don't want to expose your children to it, that's fine and that's your decision as a parent - but it's not like this is unexpected!