The problem solves itself over time. When people hit a small crack and take the “how much blood is in the human head” challenge, they tend to stop riding them. So long as they can still form cognitive thoughts afterwards.
Buddy of mine had a nice vacation in the ICU in Colorado after he played bouncy brain on the concrete. He doesn’t ride them anymore, and thankfully after a long year of recovery he will watch his kids grow up with all of his faculties in tact.