But this is not a completely crazy idea. First and foremost it means schools are trying to be reasonably responsible for their student's welfare. Surely that can be lauded.

Secondly, there is a little word called 'unsupervised' in the edict. That would be fairly important, I imagine. When I was in primary school, the school did what it could to make sure there was some kind of supervision. This usually meant that there were parts of the school that were out-of-bounds during recess and lunch for the usually simple reason that whichever teacher was on playground could only reasonably cover a certain area.

I also remember an only semi-official rule when I was at primary school that overly rough games were not permitted, even with a duty teacher. We had a variation of the simple 'tag' game called Bullrush which was usually the one specifically cited. As far as I remember, such a rule was not so much aimed at stopping kids having potentially risky fun, but to cut down on altercations with kids *not* involved in the game who happened to be in the wrong place at the wrong time. It's the latter which tends to result in more injuries, IIRC.

I expect to quickly lose count of how many times my son comes home from school with grazed and bruised knees, elbows, hands etc.

Wade.