On the subject of secrecy:
Around my house there is a store with automatic doors, which not only often, but never react to me at all, often, when I go for someone, I find myself in a glass trap (2 pairs of doors in a row form a room in which the air conditioner is). The guard knows me by name because he frees me from there all the time and opens the doors in front of me, just climbing to the sensors.