How is a police officer different from a pedestrian standing in the middle of the road? Or a kid darting after a ball? You should be riding so that you can react to something like that when you're not riding in an organized event or have permission from authorities.

There's been 2 incidents at least (or at least 2 that are being objected to here...) I'm assuming that the first time it happened, the cyclists were told to follow the rules and weren't just told "haha, we made you stop!" ... So were the cyclists continuing to break the rules when they were stopped a second time?

And have the cyclists been told several times before that by nicer means not to do whatever they were doing? Or were road blocks set up the very first time that someone wanted to tell them to obey the park rules?