Well, i don’t wash my hands when i use public restrooms because i don’t like to touch the taps there, everything about public loos are ew and i touch nothing there, not even the door handles or ANYTHING, and i flush the loo with my foot, and i don’t sit on the seat. So, as far as that goes, i don’t pick up any gross stuff there. Anyway, i have waterless hand wash in my handbag always, so when i need to wash my hands in public, i use that.
At home, i may wash my hands before going to the loo if i’ve been out that day to places where i could have touched things which the public have touched (eg food packing while shopping), because i don’t want those icky germs on me. I don’t really get any “eliminations” on my hands when i do go to the loo, and on the odd occasion where that managed to happen by accident, i’ll wash my hands of course.
Anywho, this is also why i hate shaking hands with people, because you just don’t know what their level of hygiene is and if they’re spreading germs. EEEWWW.