I was in the waiting room at a busy station and a lad who looked to be in his early 20s was standing at the door with his hands down the front of his trousers. I looked to make sure it wasn't pockets but it definitely wasn't.
I am just a bit fed up of what I've seen recently from predominantly men on public transport. Loud sniffing/snorting every 2 seconds, farting, burping, spitting. Most are not like this but it's hard to take the train these days without any of the above.
Anyway I said to the man quietly, why do you have your hands down your trousers in a public area, that's disgusting.
With hindsight I should've just reported him to the train staff. He started shouting at me and I just walked off. But as I say I maybe should've just reported it.