Haven't had much of an issue this yeara, and I fish pretty much everyday. I've had my days where I almost lose my *hit, everybody does. I try not to be confrontational, usually a heads up to the guy that you need some room is enough to send the message. If some guy approaches and is friendly and wants to fish the same run or whatever, I'm always good with that.
But, I've had some nasty, nasty exchanges in the past and I like to think I've matured a bit and won't have anymore of those issues. I also pick my spots and times wisely so I don't put myself in a position where I'll get frustrated. Ah well, they make for good stories when things get interesting.