Not stopping at pedestrian crossings (cyclists and drivers, although cyclists seem to be the main culprits around here)
Parking on pavements
Not letting me cross the road when I'm standing in the pissing rain and they're crawling along in a queue of traffic - I know they don't have to, but if they're moving very slowly anyway it wouldn't kill them to let me cross
Stopping across crossings - we have a pelican crossing near us which has a set of traffic lights about 10 yards up, drivers never leave a gap for the crossing
Drivers pulling in/out of their driveways regardless of pedestrians. Yes, there may be a dropped kerb, but I still have right of way - I've got a cracker of a bruise on my knee at the moment where someone reversed off their driveway without looking and I was already half way across
Not indicating - I've clearly got nothing better to do than stand there waiting to cross all day because no one can be bothered to indicate. My nearest bus stop is near a roundabout, you can stand for ages waiting to cross because no one bothers to indicate
Cyclists haring along the pavement or taking part in time trials along our local cycle/foot path - it's a shared path along a river used by children wobbling on bikes, dog walkers and people out for a nice walk, it's not a bloody race track (it's got to the point where PCSOs have to patrol it!)
Other pedestrians - large groups walking really slowly across the entire path so no one can get past without going into the road. People who stop dead in doorways when coming out of shops o right at the top of escalators. People standing all over the pavement chatting. Parents walking in groups across a pavement with buggies so you have to go on the road. People in busy town centres with massive fuck off umbrellas or huge ruck sacks that seem to be filled with bricks when you get rammed with one
I live in a very touristy area so I frequently get pedestrian rage when in town in the summer - i really try to be patient and welcoming and helpful, but sometimes when I'm in a hurry they piss me off.