I agree with banning tackle football for children, it leads to more skill development and removes the "I'm bigger therefore I'm unstoppable" nature that peewee football tends to fall into.

Hockey doesn't allow checking until age 13, with the increasing restrictions placed on physical play at higher levels it's allowed for way more skilled players. The same thing is happening with football, and it needs to as players are way bigger and faster today than they were just 20 years ago.