Which one social convention would you get rid of?
Not going to lie, my gut reaction was to say ALL OF THEM! Despite how chatty and open I can be online, I am actually a very anti-social person. Talking to people face to face? Especially a complete stranger? Please don't make me. Let me hid in a corner or behind someone else who is talking.
This isn't my real answer, of course. I know of the perfect social convention I would LOVE to get rid of. *sharpens ax*
FOR THE LOVE OF GOD DO NOT ASK ME HOW'S IT GOING!
Nods and smiles are the worst too. When I see people I try not to look, but constantly peek because I don't want to look rude by not returning their greeting. So please, if you see me passing your path, just ignore me because I am doing my best to ignore you. It's nothing personal.