When I was an engineer in a large Kansas City firm there was a male engineer with a company wide reputation as an OCD hand washer. Each time he washed, the process took 10-15 minutes with lots and lots of soap and paper towels. He felt compelled to wash each arm multiple times from hand to above the elbow.
Poor guy ... I don't know what happened to him in the long run, but even I could tell from his behavior outside the rest room that he had some serious emotional issues. (Not being a guy, I never personally saw his hand washing routine.)
That's going a little too far in the name of good hygiene!
Working in industry and as an instructor at the local community college, I realized that good handwashing habits did keep me from getting colds and the flu as much. That alone is argument enough for me to wash well, but I don't feel nutty about it. Just sensible. If at all possible, I also use my paper towel to open the door when leaving the rest room rather than touch the handle with my hands. Many businesses are now putting trash bins close to the exit door to make it easier to properly discard the towel as one leaves -- I appreciate that!