The point is to illustrate that those 'freewheeling actions' are not normal and not just part of 'teenage rebellion'. All of them could cause major harm to one

The point is to illustrate that those 'freewheeling actions' are not normal and not just part of 'teenage rebellion'. All of them could cause major harm to oneself or others that's not normal, signs of serious underlying problems. 'BASE jumping' or 'stunt plane piloting' is dangerous but that's something altogether different than 'driving down the freeway blindfolded' - which is quasi suicidal and very dangerous to others.