When I was in school, you would have been teased for days if the tag on your underwear showed. Nowadays, guys who wear baggy jeans have to practically put their lower back on a bus seat to prevent pantsing themselves, and every other young woman displays the waistband of her panties if she bends down or kneels.
Here's what's more alarming IMHO -- teen girls with tattoos on the small of their backs barely above their cracks! Those aren't there for their own enjoyment, are they?
You should walk around on a college campus and see all of the thongs prominently sticking out of the top of low-riding pants.