Haven't RTFT, so am probably repeating, but:
cyclists who race across a pedestrian crossing when it's pedestrians' turn, and shouting/ringing at me for having the temerity to be walking across it.
Drivers waving me magnanimously across zebra crossings. Gee, thanks.
Drivers driving badly because they're on their phone. Arrogant, dangerous bastards.
Oh, there are many more ...