I was an insane road rager when driving. I remember picking up a club lock in my defence in one incident

(shades of Jerry Springer). Moving from a V8 to a diesel slowed things down a little, but I just became a different sort of road prick.
Throwing my leg over a bike caused an instant attitude change. I occasionally find my anger rising, but rarely, and I manage it immediately now. Riding while angry... it just doesn't make sense. Yeah, you'll get away with it often, but it doesn't do wonders for your judgement and one day you'll cause yourself some grief.
My new approach (yeah, it's not *fair* or *right*, but it works for my stress levels - not saying it's for everyone): If a car merges into my lane, 99.9% of the time, *I* was positioned incorrectly. Realistically, a car won't see me, so I have to look out for myself and place myself in the lane in relation to other cars appropriately. Taking mirrors out, or abusing people will just get them angry, anti-bikes and busy justifying their actions in their heads - and then you'll complain about cager's attitudes, forgetting you've been part of the cause not part of the solution. And a proportion of them will be unstable enough to use their car to take revenge on you. Much better to ride defensively, don't indulge in anger (how old are we?) and remember that a quick twist of the wrist will not only get you quickly out of trouble, but make your smile increase as the joy of acceleration gets to you.