If anyone's honest, the reason that cyclist jump red lights is because of the energy invested in their momentum that they dont want to give up for anything less than the physical risk of getting flattened, or financial threat of getting fined by the rozzers
Hmm.. I think it's the speed issue. It's slow enough (compared to driving) to cycle places at 15-20mph - having to wait ages at traffic lights makes things even slower. Crossing London you could save a lot of time if you jumped all the lights - esp if you have to go through the City.
I wonder how much of the general public really understand the limitations of helmets
Scathing as I tend to be about the intelligence of the general public, I do believe that almost all of them realise that helmets are for protecting your head and will not stop you being run over.
As for the pedestrian argument - I still think it's rubbish. They are completely different scenarios. Peds usually have a segregated area, and the onus is on them (both from a practical and legal point of view I think) to look what they are doing and not step out infront of speeding vehicles from the safety of the pavement where they are pretty much safe.
Cyclists on the other hand are already in the road where the cars are, and a cyclist could be alert and cycling perfectly and still be taken out by a car.
I would seriously doubt that you are more likely to receive a head injury from a car when making a journey on foot than you are when making one by bike. If you do have an accident though, you may well be more likely to have receive a head injury as a ped.