Doesn't seem like a good idea to ignore party chat imo. If you were in my group and didn't reply to anything I might ask you, I'd vote to kick you. Cause the chances are that you will screw up whatever strat I wanna use, or you fail to CC, maybe cause I use another mark than what you're used to. Or I tell you to be ready to pop CD's, cause I'm gonna pull a larger mob etc.
Fail to communicate in any way is grounds to kicking in my book.......