At my last little outpost of progress, there were the obligatory chrome burglar bars on the windows, in addition to a jailhouse-type barred door leading to the foreign teachers' quarters. All that it would take lock us in would be to inadvertently close the door. God only knows if anyone had a key or not, and I am unsure why anyone would have wanted a barred door to be there anyway. Once closed, there would have been no way out.
My cell was on the first floor. During my first week there, I bought a pair of pliers and loosened the screws holding the bars in place. Most broke off in the process, so I kept the bars in place with wadded toilet paper. I just wet it and shoved it in place. Once it dried and hardened, it kept the bars in place and maintained the appearance of security. Had there been a need to escape quickly, I could have pulled the bars off with no trouble at all (provided, of course, that whatever calamity struck didn't render me unconscious.
The jailhouse door that led to the FT's quarters had me a bit puzzled. There were cameras everywhere around the outside of our wing, and there were sensors of some sort at every corner of steel fence that surrounded the wing. There was no way that anyone could enter or leave the area unobserved--- provided, of course, that someone was actually monitoring the cameras and sensors.