I am a student worker in a small department in the context of a larger school in the University. I am the only student working here. the other 6 or 7 people are all middle aged and older and this is their full time job. When I am here my workstation is at a computer at the front desk. Because of the location people are constantly walking by/behind me to do things. It is a fairly slow job, and when I'm not helping students I am on my computer doing homework/knotting/whatever. It's not a problem and I am allowed to do it. I've been here for 3 years now.
My issue is how nosy my co workers are. I am a fairly private person and I don't spout all my personal info to everyone like what's going on in my daily life. People will always comment about things I am doing on my computer or whatever when they walk by. Say I'm browsing craiglist looking at cars for whatever reason (I like to browse and look at cars/apartments/etc...just for the heck of it). Then someone will be like "Oh, swhite are you looking for a new car/apartment/furniture?". Today I had my graphing calculator out for homework and one co worker picked it up and was like "This is a big calculator!". Just now someone was walking out the door and stopped and stared at my sweatshirt for a minute and said "I've never seen that logo before. Is that a brand name?". It's never anything big, but all the little things add up and get on my nerves.
I'm never doing anything that I would be ashamed of talking about or that I'm not supposed to be doing, I just get annoyed with how nosy they all are. I know that they are just trying to be friendly and strike up conversation, but I think it's a little rude and inappropriate. I wouldn't go stand behind them at their desk and comment on whatever they're doing. Am I being completely ridiculous here?