Is it time to start calling out bad cyclists?

From the legislation:

*Precedence of pedestrians over vehicles at Zebra crossings
*
Section IV Regulation 25 (1) Every pedestrian, if he is on the carriageway within the limits of a Zebra crossing, which is not for the time being controlled by a constable in uniform or traffic warden, before any part of a vehicle has entered those limits, shall have precedence within those limits over that vehicle and the driver of the vehicle shall accord such precedence to any such pedestrian.

For the purposes of the ZPPPCRGD, vehicle also means bicycle, AFAIK.