Are we really that provocative?
Yesterday we were out riding with the club, and on our way back we were only four, riding in two pairs, fairly close. Should think it would be easy to pass us, but obviously not. Approaching junction there was a physical barrier between the lanes, and a car behind us used his horn at us. So we rode as far right as we could. Because of the junction the road was broader, so he passed us easily. Needless to say, he had plenty of space, so he passed us a little closer than necessary (don't they always?). Having passed us, and another few cars about to follow, he skids to a halt, right in front of four cyclists and two other cars!
Fortunately there had been a little gap in our peloton, so we didn't bump into each other, but I was seriously worried that if we passed him, the passenger would smash the door into us. Then he yelled at us, apparently for not using the pedestrian lane (where the speed limit is walking speed), and for being two next to each other. He obvioously hadn't thought of the dangers he exposed us and the other cars to by braking violently like that.
He drove a nice car, almost a pity he didn't get a cyclist on the roof, I would've liked to see the scratches a bike would've made. 
Where does all this aggression come from?! I just don't get it. It was a quiet Sunday, there was little traffic, and we behaved predictably until he stopped. I'm just glad we didn't have a tight peloton, a friend of mine was in a tight peloton practising team time trial when a car drove out in front of them. 16 cyclist in a mess crash, hitting the car in 50kmh (30mph?). My friend's aluminium De Rosa broke in two, and he was perhaps number 10 in the row, just imagine what the impact must've been like in for the two first.
Think orange. Earn success.