What I've learnt in this city, is if you're on a bike and come to a pedestrian crossing, drivers get pissed off if you don't get off your bike and walk it across. Once I've seen that all the drivers have noticed me and are stopped or stopping, I'd assume the courteous thing to do would be to hop on my bike and get out of everyone's way asap.
I've had people point at me, make scowling faces, etc. I once had this middle aged guy in his shiny new acura, who was at a complete stop and clearly waiting for me to cross, honk his horn and give me the finger after I rode by. He probably didn't think I was going to catch him at the next stop light, here was our exchange (note: I'm jacked up on adrenaline and pissed):
Me: What the **** is your problem?!
(lecturing tone) when you get to pedestrian crossing, you have to....
Me: What the **** do you care?! I got out of your way faster didn't I?!
Me: *more expletives regarding his masculinity and priorities*
*drives away without a word
Riding a bicycle, you are a vehicle and a pedestrian at the same time, it's stupid to think that a cyclist should always behave like a vehicle. I think drivers get mad because their are a lot of perks to cycling (cheap, best parking spots, not confined to roads, sexy legs) that they don't get. It reminds me of a farside comic where a caveman see's a bird fly overhead, flaps his arms and realizes he can't fly, so he builds a bow and shoots down the bird. I don't mean to forgive reckless bikers, but there's more reckless drivers who are exponentially more dangerous out there. It seems to me drivers are doing a lot of hand wringing over nothing, because cyclists have something they want and can't have.