Round here you get trouble from kids driving too close to you but if thats happening you can normally hear them coming up behind you from the revving of their engines. I pull out and take the lane, if they want to get around me they can overtake normally. If its too late a hand on the roof of their car and a hitch of a ride soon gets them pulling out a bit.
But only other time I've had rage aimed at me was from cocking up at a traffic light, was in too low a gear, legs a spinning and my bike going about 2 miles an hour. I deserved it and I apologised for the cockup (much like stalling in a car really).
I'm fairly new to cycling but dont see why you should lose your temper, regardless of being in the right or wrong I think even a "sorry mate!" and a silent "what a f******ng tosspot" in your head goes well. There are horror stories of cyclists being beaten, and road rage taking over. Why encourage it?!
Granted things do annoy me (people with dogs off of a lead on a bike path and make no attempt to get their animal under control for example), but I find a silent curse makes me feel better and I dont get all riled up and ruin the rather enjoyable journey into work (I use a trail that follows a large river, extremely picturesque in the summer).