I'm one of those people who says hello to people, and smiles. When I was in DC visiting I would say hello to the police, and was told that it just wasn't done, that they think it's odd.

Of course I was raised in Florida, the south, so It's southern hospitality, and I'm a strongly confidant woman (most of the time) so I will carry my chin up, I will meet you with my eyes, and if That look is not a smile, you had BETTER watch out. *grin*