Do you think risky sports where concussions are more prevalent should be restricted? Why or why not? Have you ever experienced a concussion? If so, how did you treat it?

No

Explanation:

people can get concussions if they want, natural selection. JK, on a real note, the definition of sport is "an activity involving physical exertion and skill in which an individual or team competes against another or others for entertainment", so as long as whoever is participating is doing it for fun and having fun it's fine.