My boss was talking last night about how he deals with the pesky kids we get hanging about the trikes on some rounds. He said he ignores the most troublesome one - there's always a ringleader - and tells off the most innocent one. The ringleader, who just wants attention, gets bored and wanders off and the innocent one wants to get away from being told off.
Dunno if it's really relevant, I just wondered if it would work if you told off the passenger (if there was one) and ignored the driver....
Generally, I think I'm becoming more Zen on the roads. I mutter and curse under my breath, and have wonderful imaginary conversations full of witty putdowns, by the end of which, I'm at work, or home! I know I called someone a tosser, even if they don't.