For me, this hypothetical is more a situation where we're talking about one's freedom to make choices that endanger those around them, in addition themselves. When the principal danger is to oneself I think restrictions are rarely justified, but when the consequences are borne by others, I think it's more justified. For example, when operating cars, we don't allow you to drink and drive, run red lights, or drive on the sidewalk, primarily because it creates at least as much risk for your neighbours as it does for yourself.