BigHammer: They should get off their bikes and walk. It's a pedestrian crossing, not a cycle way. Considering you aren't allowed to ride on the footpath it really makes no sense that you can ride over a pedestrian crossing.
I can get to work nearly entirely on a shared pathway now, which includes 3 crossings. And yes I cycle over all of them once the way is clear.
In some cases it is safer to ride on the footpath. When the family go out for a ride which includes 2 smaller kids we never go on the road. To full of "muppets" as being discussed in another thread.