Come on gang, we can work together and defeat Covid-19!
Surely a motion sensor, and monitoring if a soap bottle gets pumped or not, and if someone opened the bathroom door to leave, can all be used together to reliably determine if someone is one of those knuckle-dragging soap denialists. If so, then a little speaker by the door can say:
“Go back and wash your hands with soap and water, you knuckle-dragging virus and bacteria denialist”.
If anyone feels like nominating me for a Nobel Prize for this great idea, which might actually save a bunch of lives, no thanks. I hereby release this idea as public domain, let it not be patented.