I'm actually an expert on electronic access control and sold fire rated doors and hardware for 8 years. If you came up with this with no prior training, you may actually have more knowledge than 95% of the installers I've worked with over the years.
An alarmed exit could mean many things. There could be a door prop alarm, an exit alarm, a delayed egress magnet or similar to what you said, a door position switch mounted on or in the frame that simply triggers and alarm in the software. The first three are audible alarms meant to attract attention. The last, the door position switch, is just a relay telling the access control panel that the door is either open or closed. The software would have to be programmed to interpret that as something more like sending a text to security or even a simply flashing of an icon.
Or, it could just be a fire exit with panic hardware. If it's a fire rated opening, all that really means is the hardware is 3 hour fire rated and the door must have positive latching. That doesn't mean it has to be or ever will be monitored.
Furthermore, not all EAC systems are 24/7 monitored. They just aren't. If I was a betting man, there's a panic device on the inside of that door, an emergency exit sign and maybe even at one point it was monitored but after years of people propping it open, they gave up on that.
I read that thread you're referring to. It starts out with incredible amounts of stupid and only gets worse from there. If Police or Fire were notified of every propped exit, crime would be 99% more than it is today because they would be chasing false alarms all day/everyday.
The hand scanner. Bet it's made by Schlage and has Ingersol Rand on it. I've had training on that reader when I was with distribution and all it does is send a 26 bit weigand signal (the most common language of access control systems) to a panel. They have them all over UGA dorms. Which still, has not a damn thing to do with that side door. It just means they would rather not have to issue and reissue prox cards or fobs day in/day out to student that lose them and they would rather spend $1,000 on a biometric reader since kids don't usually lose their hands.
Great info.!!! I was basically just "sleuthing" by looking at the photo. I saw that brick sitting there and it was pretty clear to all but apparently their idiot gang that the brick was there to prop open the door. My guess is that this area is in reality.....the smokers lounge. And as you said, they just got tired of all the door-propped alarms the front desk was getting. The picture shows a truck backed up to a fence just feet from the door. Again, I would not have been shocked that this door was initially intended as some sort of delivery door or student/employee exit to a parking area. But for whatever reason that changed and they threw up a fence.
In any event, you don't put a window in a door unless you want the inside persons to see who is outside. If the door was never intended for outside access....it would have been a windowless door and clearly marked inside with signage. But you are dead on right....they basically have put a piece of black electrical tape over the blinking red light saying the door is propped because it has blinked every day since it opened.