I work in a school library, after school.
There are two doors to the library, one at each end. Only one door has the beepy security gates by it, so last year I had a sign put on the other door, requesting that it be kept locked.
It's true, the locked door would otherwise provide a shortcut to a couple of departments, up the stairs immediately behind it. But it's not an insurmountable distance to just use the other door, and walk by whichever route one prefers in order to get to specific classrooms etc.
Some staff do open the door for students if they are going that way themselves, but I refuse, for several reasons.
1) I have enough to do supervising students already. I do not need to be running up and down like a jack-in-the-box because a student decides they want to use that door.
2) If I open it for one person, I'd have to open it for everyone. Like I said, I have enough to do; I'm not running up and down the library, and leaving it unlocked would mean keeping watch for students smuggling out books.
3) It really isn't that far to walk around, whether you want to enter the library or exit it. Sure, it may take a couple more minutes, depending where you're going, but it's not a huge trek.
I had one student ask me the other day if I would unlock the door for him, because he had to see a teacher (I think) and then go to some sports training, so he was in a rush. Basic gist:
Student: "Miss, can you open that door for me? I need to see Sir in..."
Me: "No, sorry. You can walk around."
Student: "But Miss, I need to see Sir, then I've got xyz training [holds up boots]..."
sorry. If I open it for you then I have to open it for everyone, and there are a lot of people in this school."
Student: "But Miss, I'm in a rush. I've got xyz tonight and I need to get to [classroom upstairs] now, like, and it's long going the other way."
Me: "You know, standing here talking to me takes time... you could have been up there already by now."
Cue student leaving by the usual door.
Don't get me wrong, he wasn't especially rude
- his tone was polite and he did obviously realise that I didn't have
to unlock the door. I've always had a policy of keeping that door locked, and not opening it for people. I'm nothing if not consistent. But there are other students who will stand outside and bang on the glass, or try and climb in an open window rather than walk all of 20 metres(? I'm estimating!) to get in the usual door. Or stand and argue with me about why I should unlock it for them and if they're late to see Sir/Miss then it's all my fault
for having a "problem".
This sort of thing happens at least several times a week.