I can see both sides. On the one hand, without being able to even mention DPS numbers (because how would you have them without a parser), if I get someone who's underperforming, as two DPS in my first Bismark attempt the other night were, I can't say anything. Even anything polite--as I tend to be 'cause shit, man, it's only a game--like 'hey, I don't know your class very well but you're pulling pretty low numbers, maybe look around reddit a bit?' or 'are you saving/popping all your buffs for the burn phases?' or whatever. So if I want to avoid that my only option is to be kind of an ass in PF.

On the other hand, Bismark Ex drop 175 weapons. You can get 180 weapons from Law like, the first or second day that you're 60. As fast as you can unlock Bismark Ex, probably. Why would you get all RAWR FARM NO FUCK UPS ALLOWED on a fight that drops sub-standard gear? Just clear it and move on to Ravana, who actually drops an upgrade if you're so damn serious about the game.