Can I just say, and I'm just being honest...

[pocaracas]

Underwear is supposed to go under.
Pants are to go up to the waist.
Letting them halfway down your legs is, at least, uncomfortable...at most, forces an awkward walk which  can affect your physiology and have repercussions on the way  you walk (or not) years later...

It sounds like a weak sauce excuse for forcing a kid to conform to your dressing style.

Hey they're your kids not mine. Just tossing in my opinion.

It's not the style that's the problem...it's the incorrect wearing of a particular item of clothing.
If that item is meant to be worn like that...then alright.
But it's not and wearing it like that can have repercussions...damn, I'm old...i was about to talk about joint pain and stuff like that...