I've seen HappyOrNot terminals in airports (typically at airport restroom exits: "How clean was the restroom?"). This seems like a terrible idea from a health perspective! These terminals could be a serious vector for spreading illness, especially for people leaving a dirty restroom in a high-traffic international airport.
I can't remember the last airport I was at where there was an actual door you had to open. Although that is probably more for convenience w/bags than cleanliness.
At least around here, crowded places started removing door handles after the SAS epidemics on Asia. I am pretty confident it was because of health issues.
I am assuming the airport had stalls with doors, and those doors had latches. I admit I don't travel very widely, but I'm yet to see hands-free stalls.
It shouldn't be hard to order the sequence of steps such that washing your hands is your last activity before leaving the bathroom.
Good idea. The airport restrooms already have hands-free sinks and blow dryers. They could incorporate the voting mechanism into hand sanitizers so voting actually reduces the chance of spreading germs. :)