Grindcore spawned out of crust punk so is it similar.

I've never even heard of crest punk :]

Is that when you don't add the right amount of water and get to much crust?

I've heard the term before but never knew aything about it until I just looked it up on Wikipedia. The culture is similar to anarchopunk but revolves more around the ideals of vegetarianism, racial equality, and the like. They give a list of groups within the scene but the only band I've even heard of out of that list is Wolfbrigade and I don't know a thing they do. Interesting stuff......

Check it out

http://en.wikipedia.org/wiki/Crust_punk

And then here's this

http://www.imeem.com/people/bOT7Je/music/q1kTXRNO/wolfbrigade_the_awakening/

Bad Brains I'm guessing you mean old punk bands.