This is an example of something that happens frequently. Store owners or building owners want to protect there merchandise and prohibit unwanted foot traffic in and out of unsupervised areas.
There is almost no way a person scared and almost blind from smoke would be able to exit from this door.
This also makes entry into this door difficult for firefighters. That top slat would be difficult to get to.
A lost firefighter could find the door locked and even remove the lower slat, but the top one may keep him from escaping.
Keep a good look out for these and explain the other options out there that are safer, like panic hardware.
Stay safe and do your inspections.