80% of straight men doesn't wash their hand after using a bathroom. When I use the public bathroom I would use a small piece of tissue paper to open the door. I am not germaphobic, just don't want to touch someone else's genitalia stain.
I work in a pharmacy. My store manager at Walgreens asked my pregnant employees to clean the shitters. Are you f&*^ing kidding me! I threatened to call the health dept and newspaper and local tv stations. Guess what?? Her fat ass cleaned them.
Egads...this really is an issue. Does said non-handwasher get sick often? I can only imagine... A lot of people have excuses for not washing their hands, like saying "but bacteria is essential--we NEED it to maintain a healthy immune system!" And that's absolutely true. Which is why antibacterial soap is actually NOT a good idea. However, there are countless UNNECESSARY germs and bacteria that can cause illness and disease that can be washed away with regular soap and water. You should probably make this less of an "I, anonymous" issue and more of a "hey, listen hear--wash your hands cuz it's grossing me the eff out!" thing. Good luck!