I've stopped going into Brighton for shopping because their "Beryl bikes" are such a bloody menace. They totally ignore the pedestrianised areas, weave in and out of pedestrians and seem to think they take priority over everyone. I nearly got sent flying by one as I came out of a shop into a pedestrianised street.
Mind you, ordinary cyclists are little better. They ignore the "pedestrians only" rule in part of my town centre. I have a bee in my bonnet about them after a colleague was hit by a cyclist ignoring a red light at a crossing. Her back and pelvis were so fucked by the accident that she was never able to work again.