Dustin is right.
I walk around central London, and see all manner of cyclist - no lights (this is very common), dark clothing and no lights, going through red traffic lights, on the phone, smoking (not seen one on the phone AND smoking yet). I hardly ever see one on the pavement though.
However, in two days I saw three cyclists pulled over by police on motorbikes, so maybe they're cracking down a bit on the idiot ones.
I ride a bike too, so I'm not just a cyclist-basher, but those cyclists are a menace to me as a pedestrian (as well as themselves).