I hit my "hello there!" bind when I get tapped in back or on the side. Most people think its funny, and hey, when there are alot of people in a corner and you get a love tap that really does nothing, why get angry over it?
I do also have "SORRY ABOUT THAT" binded to one of my buttons. I am mindful though is if someone gets spun out because I hit them, I let them get up and moving and back into their position in front of me.
Ever notice once in a great while, you pass someone, cleanly and all, and they get infuriated and ram you? And then they use the "sorry" bind. Ohyeahright. Nice try on covering up your adolesent anger.