This is my favorite quote from the article: “I’ve been the principal who’s stood there and said ‘Oy, kid! Get off your bike! You’ve got to walk your bike!’ Then I’d go away and think ‘Why the hell did I say that?’”
As a teacher in an after-school program myself, I find myself thinking this or something similar nearly every day.
What upsets me is that more often than not, the answer to "Why the hell did I say that?" is not the children's safety, it's that it's what I'm expected to say or that I want to look responsible around other teachers or parents.
The fact is, a principal is in a far better position than a teacher to change a school's culture, and indeed, a cultural shift is what is necessary for kids to have greater freedom on playgrounds. As a teacher, I have to weigh not only what I value (kids' freedom and developing understanding of social/physical interactions) but also what the school (administration and other teachers) and parents value.