Back Door is a form of malicious feature in which the program is configured to respond to commands sent to it from the developer. A Universal Back Door is an ability of the developer to remotely change the program to do anything the developer desires it to do. Sometimes Universal Back Doors are called "Auto-Update".
This comment thread is for people to document various implementations of this malicious feature.
This was the first time I've ever cried from a film. And that experience made me addicted, both to Steven Spielberg and A.I. and also to watching films seriously. Taking in what the directors is trying to do. Letting the film overwhelm you. Letting it break you. And perhaps made me a better filmmaker myself.