@Joe: One place I worked used extremely small cameras, think pin-hole with wide-angle lense, in the normal course of their business. Some people apparently had a bad habit of setting the time too long on microwave popcorn and walking away, intending to return to get their popped popcorn after they visited the bathroom, etc. When the bag in the microwave caught on fire, triggering the fire alarm, the people would of course not own up to what they had done.
So, the logical thing to do would be to install one of the extremely small cameras to monitor each microwave oven and identify the people incapable of properly operating microwave ovens. Instead, the company removed all the microwave ovens from the campus. And the company wondered why people felt like they were being treated as small children instead of adults.