And then they open the restroom door with the same hands. You know, the one you have to open to get out.
How often do you think maintenance sanitizes the door handle?
If it's a pull door I use a napkin - if it's a push door I use my shoulder. In either case I always try to take advantage of someone else opening the door.
At my office the toilettes automatically flush. For some reason that doesn't happen at home. ;-)