What do you think about calling out a stranger for wiping their nose and putting their hand back on the subway pole?
Why do you want to confront this stranger?
That's so gross, I'm getting sick just by imagining it.
I agree, that's a very gross behavior. You shouldn't just stand by and watch as someone sneezes and wipes their hand all over the place, especially in a highly trafficked area.
I have to stop them otherwise they'll carry on doing this.
It's definitely an unsanitary thing that they shouldn't be doing. Be careful and polite when calling them out though; politely suggesting they should use a tissue when they wipe their nose or sneeze is better than screaming.