I've never understood why people don't habitually wash their hands after using the restroom. It's not that you crap on your hands; it's that you've been in a public place where some fecal and other biological material is spread around. Also, even in an ultra-maintained restroom, it's just a good opportunity to wash your hands of all the crud on doors, desks, phones, walls, shoe laces, etc. etc. People should have been washing hands about five or six times a day, and now should double that. Let your inner obsessive compulsive disorder blossom. But the people who use the bathroom and don't wash their hands are just being shitty, literally, even if they just used the urinal. In the best of times, not washing hands creates vectors for hepatitis, among other ills.