skyguy - If FL runs their show like OH does, a quick call to law enforcement will result in immediate action. You're right - how can they hope to enforce a ticket that's written to an essentially unregistered vehicle? But I'd guess the officer might be willing to wait a bit for the cart's owner to arrive and go from there. Otherwise, have the cart towed and apply the ticket to the tow bill. Just idle thinking - don't know how enforceable that would be either!!
Easiest way to make the point would be get some help to push the cart to another parking spot. That might help make the point to the cart's owner!
Bill