Prison Guard Imposes Arbitrary Rules on Library Inmates

I've been in the library reading Con Law. Decided to take a break to go downstairs and get some popcorn & pop (am pretending I'm at the movies). The library doors lock after 10 and you need to swipe your ID card to get back in. My ID card doesn't work, so I usually have to ask a security guard to let me in. Lots of people have this problem, I don't know what's wrong with the cards. What am I supposed to do? I didn't manufacuter the dang card. The door is right next to the security guard's desk, so I asked the guy to let me in. He said, "If your card doesn't work, it means you shouldn't be in there after hours." Is he serious? First, there's no distinction between students that can and cannot be in the library after 10. Plus, I'm holding the ID in my hand, with my photo, clearly proving that I'm a student here. I'm here all day, every day, I've seen and said hello to this guy 100 times. Anyway, what kind of riffraff would be trying to break into the library at 11:30 p.m.? His comment was so utterly absurd that I was speechless. Here he is, sitting at a computer, playing solitaire, five feet away from the door. He probably wouldn't even have to get up to let me in. He could just scoot his little roly-chair over. Did he really think I would be like, "Oh, okay, you're right. Guess I'll just go home. My laptop and jacket and purse and everything are up in the study room, but I guess I'll just get them tomorrow when I'm allowed back in." WTF? The whole thing just makes the library more prison-like than it already is.