Lol, my gym teachers in middle school didn't do stuff about that stuff even if they said they did. When we had to run laps around our school, they'd always say they would be watching. Didn't stop my fat ass from walking the laps.
As well, I skipped out on all of my track events and just hung out with the other skippers in a nearby park. The next day the teacher asked me why I missed all my events, told him I didn't want to go. He just nodded and walked away.
Good times.