Comment by josephcsible

> Unfortunately in the real world, that's not how it works. In the real world businesses fo not operate with a "innocent until proven guilty" attitude. Quite the reverse.

> Pretty much any security starts with "guilty" and moves up from there. For example my building has a buzzer, not an open door. I assume all visitors are nefarious unless someone in the building vouches for them by buzzing them in.

What you're describing is the exception. Consider that most merchandise in most stores is unlocked, and that most sit-down restaurants let you eat before paying for your food. And doors generally only work the way you do when they're mainly employee doors. Most places that customers come in all the time are just always unlocked.