Should be Abided by, let alone put at Every Youth Sports Fields, Rinks, Diamonds, and Courses

This perfect sign from a Canadian hockey rink should be posted at every youth sports event: http://t.co/WwtQd3QBsV pic.twitter.com/VdXNBEOTEL
— Buzzer on FOX (@BuzzeronFOX) March 17, 2014

An indirect production not based on the tweet above or the sign, but a great piece of work about youth sports, directed by Peter Berg, "State of Play."