Kudos to you!
In my neck of the woods, wearing pants below one's behind is called "busting a sag". I've employed a couple of folks who practiced this fashion statement; however, in a manufacturing environment, it could prove dangerous. I tell them pull up your pants or go home. They pull them up.
Frankly, I don't care to see anyone's underware, ever.
You know what, I agree with you. I don't want to see underwear either. However, that doesn't mean I can support a law that fines those who's waistbands are visible.