Outside my office is the IT department. They sit at desks with no walls or anything in the middle of this big open room. When I walk down the hallway from the bathroom or kitchen and turn the corner to get to my office there is this one guys desk literally RIGHT there. So I just happen to naturally smile when I lock eyes with a stranger. Call me crazy but I just find it a polite thing to do. But, whenever I walk by (and I don't think it is just me I assume he does the same thing to everyone) he always looks at me and our eyes meet and I'll smile and he never smiles back. Ever! I have been here for 5 months and he's never looked at me with anything but a blank stare. I've said hi in the lunch room, smiled, etc and he just looks at me. If you aren't going to be polite and at least half-smile back, don't look at me!