A portion of this story reminded me of the "Story of Manna" by Marshall Brain regarding the automated fast food restaurant. These days, it would be very cheap

A portion of this story reminded me of the "Story of Manna" by Marshall Brain regarding the automated fast food restaurant. These days, it would be very cheap and easy to wire up simple "HELP" buttons at all the trouble points in a restaurant, along with cameras and machine vision (other than cameras in the bathroom). And those sensors could create a synthesized view of a restaurant or department store, or whatever. The synth view can then inform where help is needed. But these sensors, low energy cpu's and radios are already attainable at the cheap. And at industrial productions, could be as low as $.50 per button. I'm really surprised why nobody has done this yet - and I read the article and found that yes they have. It's called HappyOrNot, and it's for surveys and quality control of every metric in 1 variable.