I agree with the original post. I live on Bankside and regularly walk on the Thames path and think cyclist dismount signs should be posted at regular intervals, perhaps during certain hours. Last year walking through the scaffolding area on Sea Containers House three foreign men passed through on Boris bikes so fast, that had a collision happened, someone would have died, I shouted and they were laughing at me riding off into the distance. Caught up with them at the National Theatre though. Idiots.
I walk just about everywhere in London and see all sorts of near misses and accidents. Lately, I feel more and more threatened by bike riders. I follow all the rules of the road, but when crossing at zebra lights, many times a bike has whipped right by me. I am also seeing more and more people riding on the sidewalk. Many times, I have yelled at them, to get on the street. Red lights to some bike riders just mean a quick get away before the traffic moves. I now take extra precautions when walking, as getting hit by a speeding bike can do a lot of physical damage. On shared footpaths, it would be sensible to ring a bell or give a signal, before speeding by walkers.