The entire machine rotates at over 500rpm?

Its a spinner in my book. I dont really see the difference between this and a melty brain bot except that the melty brain FBS is able to move whilst spinning.

Simple solution is to build something that falls on one side or the other of the line.

Its a tricky one but you would be best contacting an event organiser directly as it is ultimately up to them if a machine runs in their arena.