Zombie Pigman

Zombie pigman are annoying. Today I've died about 25 times from them. On two different games. The problem is whenever you hit one they all come and mob you. I've had twenty all chasing me before. I die a lot. But it's good when you can get a creeper to blow them all up so you don't keep dying from the same ones over and over. Excuse me, I must kill them now.