Most schools have a sliding scale of detentions and sanctions - in the DC school it is 5 mins at the end of a class or 5 mins at break, 15 mins after school, school detention which is a Saturday, but has recently been changed to an hour after school, and probably some more grades in that scale.
I agree it isn't the detentions per se it is the increasing prevalence of zero tolerance sanction based discipline, coupled with 'old skool' habits. Daily uniform checks?
I roll my eyes at someone who sends their child to school with an obviously strict / smart uniform policy in canvas shoes and then goes to the press about it.
But I think there is a valid debate to be had.
There is no evidence, for example, that a strict uniform policy has an effect on behaviour. Or rather research has shown that the imposition of a strict uniform policy has no impact on discipline standards.
Is it Toby Young's school where the teachers wear gowns, FFS?