My elementary school responded to the swing jumping threat by putting a fence in the way. But they put it just close enough that you could jump over it if you w

My elementary school responded to the swing jumping threat by putting a fence in the way. But they put it just close enough that you could jump over it if you were really ambitious and get hurt pretty bad if you hesitated. I still wonder if the move was 100% oversight or if somebody on staff recognized the lesson in it: be good or be good at it.