He should get abuse for beeping his horn for that. Winding down the window and saying "excuse me" is the correct protocol.
I have a school near me, and like to sleep in til 8:30, and get bleeding woken up at 8am by all the Chelsea tractors beeping away trying to get parked. Iceholes.
I nearly came a (very slow) cropper today when I trundled up the inside of a BMW stopped half in the ASZ. I was alongside him when the lights changed, and he set off, flicked on his indicator, and turned left nearly on top of me. Silly bugger. What's the point of indicating like that, I shouted.