I think this issue popped up when the mob cap limit was introduced, it surely can't be right. :/ http://empireminecraft.com/threads/bug-attack-of-the-ghasts.14970/#post-254006
I've also died about 5 times attempting to cross them, but they're everywhere, destroying bridges and I just can't get to my grinder D:
Very challenging it took me forever to get to my grinders and even when i was fixing it they kept destroying the red stone and everything but i like the challenge
Alex, I'm not even attempting to go to my grinder last i was there bam 10 ghast knocking on my door saying Trick or Treat. I got Tricked
Ya i live on SMP8 and one of my friends went to go burn something and he was like "Am i allowed to kill ghast because there are like 20 of them" Lol
If making a nether building, use cobble, nether brick or iron bars. Those are the main cheap materials I know about atm that are immune to ghast attacks.