The funny thing is that from a fanatical ecologist's point of view, banning all internal combustion engined vehicles would be a good thing. Cars and bikes pollute the air you breathe with poison, they make loads of noise, the surrounding air temperature rises because of them, and the best (worse) bit is that they kill thousands of people every year.
I think that I'll strap a tank of nasty gasses to my back and rush around the city centre making loads of noise, firing off the gas and then killing people and saying "sorry mate, didn't see ya". Don't think it'd be long before PC Copper came to take me away.
Ban 'em all I say.