Yes, in this current cultural climate a person really has to
not assume that everyone else is socialized and civilized. Another good idea is to use the elbow when extracting paper from those towel dispensers.
But as far as restaurants go, it is a shame that managers do not take a more active role in educating their wage-earners, most of whom are immune to the diseases they carry and spread.
My husband taught me that trick, opening the door with a paper towel. I told my son about it too but he said he had already been doing that for years. I think alot of people have finally figured out that the door knobs are filthy. We also turn the water off with a paper towel because everyone that does wash their hands had dirty hands first.