Yes but after the last death to happen in nascar, they completely changed regulation and enforced the use of neck braces so that the rear-end crash wouldnt be crippling/fatal anymore.

Also, idiots are idiots, and if you dont have the training to do what they do, you get what you deserve if you try something that foolish.

Most people that are involved In that sport have some kind of semi-serious injury(like a compound fracture), but they go through rigorous training regimes so that their bodies come out like martial artists and in particular MMA fighters. It's not like these guys just get on a bike and say "I'm going to do a double backflip today."