Here's my outlook,
"John" just dropped a duece, John's hands are now a germ playground.
John turns on water.
Valves have now come in contact with his germ hands.
John washes his hands to the strictest of standards. Hell, he sings happy birthday SIX times!
John now turns off the water, touching the germ ridden valves again.
John now operates the lever of the paper towel dispenser.
Paper towel dispenser now is filled with germs.
John leaves the restroom and touches door handle infecting the door handle.
Oh now multiply this by thousands of Johns. Yeah, no thanks. I avoid touching anything but my own body. I even open doors with my feet.
I get what ur saying. That's why after I do my business, I don't flush, proceed directly to the sink, turn on the faucet, scrub hands, leave water running, hit paper towel lever with back of hand/forearm, dry hands, turn water off with paper towels and open door with same towel. If no towels available then I dry on my clothes and open door(if pull) with least used finger on hand(left pinky).