Recently here in NY a group of Scouts were on a whale watching trip. They were jumping up and down with every wave. They were told numerous times to stop jumping. Over and over again. The importuning was ignored by the boys.
One boy jumped one time too many and fell overboard and was lost at sea.
Every day we lose kids to accidents that could not be avoided, then we have those who die due to their own obstinance.
I heard about that NY trip. Awful.
I have two occasions called parents in and told them, "Your son is continually disobedient. It makes him a danger to himself and to others. Either you have to start coming to all Troop events and directly supervise your son - and that means be with your son all the time, not hang out with the other adults - or your son has to leave the Troop."