The only place I've run into one of these so far was leaving an airport bathroom, which is pretty much one of the last places I'd want to share a button with strangers. There's a reason those places typically don't have doors.
Was this in DFW? I saw this when I was passing through there last month, it didn't look like a HappyOrNot terminal but very similar
Makes sense for "somewhat happy" ratings, but I imagine that if you found the bathroom disgusting, you would still find some way to press that button.
Hard surfaces don't transmit disease effectively.
As opposed to a door handle?
I think they would make a lot more sense with foot pedals.
Make the buttons out of copper or other antimicrobial surface?