Bad Behavior on Trains

[fauxklore]

I'm at my Mom's house, to take her for her annual Mother's Day theatre outing (which is this afternoon, not tomorrow, for reasons of convenience). Amtrak was okay since I got a seat in the quiet car and the conductor was vigilant about tossing out the person who didn't grasp the concept of not using a cell phone there. But I was a bit amazed by some teenagers on the LIRR.

On what planet is it socially acceptable to wash out your new belly button piercing with saline on a commuter train?