Sports Day at DS Senior School is looming once again. They are supposed to sign up for events, but if they don't for whatever reason (e.g. can't be bothered, DS I'm looking at you) no-one checks and they have a day of doing nothing apart from being at school in their PE kits. They threaten detention if you call in sick. I'm generally a rule follower but I wish they'd just organise a sporting day for the sporting students and a study day for the rest. DS attendance is otherwise excellent and he works really hard and achieves good grades. What would you do in my position?