We're so happy we get to bring a little bit of YOU along with us that we could just die!
Seriously. If you must hock your guts up and let fly with some nasty lung-butter in public, please at least do so in the grass, off of the curb, in the street.
It's not sanitary. It's not nice. In fact, it's downright disgusting and you're an effing sumnabitch and your woman is going to leave you because you're a nasty mutha and you're ugly. And you smell.
Expel bodily fluids from your person...preferably at home.
Hock one right onto the middle of the sidewalk, while waiting in a line, next to / in front of newspaper kiosks, ATMs, doorways...
Get a clue, sicko. We hope you end up at a drinking fountain which one of your brethren has already visited.