My LPGA neighbor Jaye Marie was in a bad accident on one up at our beach a couple of years ago. She’s still not the same.
I think they’re dangerous, and many people that have never ridden a mini-bike or a motorcycle just aren’t prepared to safely operate them.
Sometimes people have trouble learning a new type of bicycle, too. I recall my dad, who had never ridden a bicycle that didn’t have a coaster brake, trying out my brother’s new 10-speed that had hand brakes. He was still pedaling backward when he hit the fence. Much hilarity.