I gave up trying to get too involved years ago when I noticed the guy I was discussing things with had a pistol in a holster on his belt. He'd said he was a cop but didn't know the laws regarding safe/legal passing distances he'd wanted to violate, and I figured it wasn't worth continuing the discussion if it meant getting shot. Since then they've changed the laws to allow the paranoid to carry loaded weapons in public and I haven't had anything happen to me that made mad enough to try and discuss things in person with someone else who may feel like shooting instead of talking.