People getting honked at can turn violent pretty fast. I've known otherwise friendly folks who lost it once behind the wheel. Not necessarily violent but some began calling other drivers morons, dummies, old fools, etc. Once out of their car they returned to their usual polite self. Dangdest thing I ever saw. I've heard a few stories at the range where they were engaged with someone who was obviously pissed at them and the other guy did the "road rage" thing trying to cut them off.. I once honked at a guy who ran a stop sign, an instinctive thing to do as I slammed on my brakes. He jumped out of his car waving his arms and making obscene gestures so I simply drove around him., He followed me to the cemetery I was headed to but he didn't turn in when I did. I kept thinking "this is it".
People are crazy!