Is it time to start calling out bad cyclists?

I don't want to be a dick about it and I approve of the rule in theory but I don't get how you are supposed to turn down side roads in central London if you always give way to all pedestrians, in some places there's basically never a point where there isn't someone trying to cross the road.

^This

Picking your moment gets tougher and tougher..... If, as stated by law, a bike is a veichle, and as the rules of the road say pedestrians should only start to cross when it's safe to do so - That means when a bike is turning into a crossing and you have'nt stepped out yet, you have to let the traffic pass by. If you step out, you'll obstruct the rider, and base human instinct will exchange embarassment at causing an incident into an enraged victim should you have the misfortune to get hit by said rider by essentially being a ped in the wrong.

The rules get ever foggier, I guess you have to make a judgement call when you're more in the right than in the wrong, and take the opportunity when it's there.