FYI

Do any of you out there use this expression? I do, and apparently my roommate thinks I am out of style to use it. He would not shut up about it. I just wanted make him aware of the door being locked, so I said "FYI, the garage door is locked." From then on all day, EVERYTHING was FYI (fill in the blank). When I think about it, I don't remember hearing others use it that often, but I don't think it is as nerdy to use as he makes it seem.

Where are you on this one? Team Red or Team Roommate?