If thats not part of the dress code, yes. But again you are looking at individual cases rather than the whole picture.
You are determined to miss other people's points aren't you?
"DD is at a top 20 US school. Kids wear PJs to class. They still get into MIT, Westpoint, the Air Force Academy..."
Ah yes, you know the ones that you pay for through your local taxes. As a teacher I wouldn't want kids in my class room in pyjamas it shows that they aren't taking it seriously. Oh and your kids might get into those places, but its cause of the privileges you bought them not their ability.
There's so much wrong with these statements it's hard to even know where to start.
Yes, we do pay for colleges like Westpoint and the Air Force Academy through taxes, although not local ones. I don't think there are any colleges in the US paid for through local taxes?
If you think the kids at DD's school aren't taking school seriously because they're in PJs then you truly are blinkered. I do wonder how you explain them getting such high scores on national tests despite 'not taking school seriously'.
If you really think kids only get into MIT/Westpoint/Air Force Academy because of the privileges they've been bought then you're extremely poorly informed.