There's already 12 bets in the pot. Leading out with a bet will give people 13:1 and greater odds. So any draw with more than 3 outs will call here. In other words, betting here will not protect your hand.

If you want to protect your hand, check to the PF raiser and raise him. That'll give people 7.5:1 odds on their call, which might eliminate gutshots and other weak draws - although you never know with these people.