Unfortunately, in London it seems that pedestrians treat cyclists with the same contempt that drivers do. There are those that look and stop to let you pass; those suicide cases that don't look and cross; those that look you in the eye and cross right in front of you.
The wonderful 1st set of peds are in the minority and I often smile with thanks as I pass. However, if you think the 3rd set of peds are allies, I can't imagine what your enemies are like.
Can you imagine the mayhem when electric cars become more popular? My partner had a test drive of an electric Smart the other week and you can't hear it coming... Those peds that can't be arsed to look might want to rethink their road crossing strategy.
It's not contempt though. I think a lot of people are opportunistic - you see them doing the same to cars, even making the cars have to come to a complete stop sometimes.