Just smile. You were a kid once too.
I was walking into the grocery story the other day, and happened to get right behind the cart-pusher guy doing his job. He had just wrangled a chain of carts from their metal cage.
You know, many carts linked together are very heavy! He was getting his OOOMPH going, for the needed momentum to push them the distance to the store entrance. Just as he puuussshhed them with all his might, his baggy saggy jeans fell down to his knees!
It was hard for him to stop the rolling carts with his pants restricting his movement. But stopped them he did, and then turned around to see if anyone was watching as he pulled his jeans up.
I was standing right behind him. He turned red and laughed sheepishly, "Oh, sorry."
I said "Well, It's okay. I have a son who is a few years older than you. He went through the baggy jeans phase, but I don't think his ever actually fell off. Oh, and nice boxers." He just laughed again. I did too.
I added "You might remember a belt next time though, because some of your customers might not think it's funny." He agreed.
I think the young man was about seventeen. I hope he took my advice seriously, even though I gave it in a light-hearted way. I am an easy-going person and I didn't want to get the kid in trouble, but I did want to make him think. Work is just not the place for your butt crack jeans!
If it had been some other person standing behind him, they might have been highly offended and tattled to the manager. But I say give him a friendly warning and another chance. Maybe it's the Mom in me.
There are plenty of big issues that many offended people are frequently ranting about. In my opinion, this was a small issue.
And every seventeen year old boy-man needs a second pants-chance, don'tcha think?