When I was in high school it was the Principal's goal to have our shirts tucked in our pants. When you don't hold the line kids will push the envelope to some pretty ridiculus limits.
By the way, I still tuck in my shirts and feel improper any other way. A big thank you to my old principal who may have felt like giving in but didn't.
It's about time American schools introduced proper school uniforms instead of letting pupils attend class in whatever they like.
"When I was in high school it was the Principal's goal to have our shirts tucked in our pants"
A loose shirt hanging outside of the pants goes a long way toward covering up some embarrassing aspects of being a teenaged boy, it seems to me.