I think the OP has a very good point and is not being paranoid. Of course I am not a mental health practictioner, so what do I know. I believe in exposure to germs for a healthy immune system and I eat anything that falls on the floor that I can get to before the the dog does. This is my personal choice. I rarely get sick. But for those who believe in minimizing exposure to germs, it would be nice if people serving the public face to face had beter hygiene training and enforcement. Of course hygiene habbits that occur out of sight is out of our control. You can combat this with measures that are under your control. There are travel purifiers that can sanitize with UV light as well as good travel filters on the market. I have also seen travel "black lights". Maybe if we started to shine these on people it would help them reform their bad hygiene habits! The OP could also just bring their own beverages or cup or wait until someone comes along with a cup on a tray that you can grab yourself. I have not found a travel electron microscope. This would allow one to know for sure what germs are indeed swimming in your beverage!