You seem to be missing something here, maybe you have comprehension problem. I work in a secure building and we have to use badge swipes to get into the building with a pin code. If somebody tried to follow me into the building without entering their pin code Id shut the door in their face or tell them flat out you need to put in your own individual pin to get in, you can’t tailgate behind me. Why anyone would try to still forced their way through is somebody looking to cause trouble and they have their phone out? interesting.
Where did you get the idea he forced his way into the building?