How may realise that the perception is much worse than the reality when it comes to washing of hands etc. in toilets on planes, airports, offices etc? Do those with the "EEEEEEWWWWW" type comments consider that the taps etc. in these places harbour several multiples more bugs and varieties of bugs than their own hands or private bits (in most cases, assuming you generally adhere to good hygiene)? These places are worlds away from your private bathrooms because they are frequented by people from diverse backgrounds, some of whom will have very dubious hygiene standards and will therefore be carrying around nasty strains of E. coli, staphs, salmonella, pseudomonas and more which they transfer to whatever they touch - pathogens that thankfully are rarely a problem in our own bathrooms.
If you use the facilities in these places and handle the taps door handles etc. you are likely to be more at risk of picking up a pathogen than transmitting one, assuming, of course, you inhabit the "good" end of the hygiene spectrum . Being trained, and very hygiene conscious, I know that certainly applies to me. I know that my bits (and to a lesser degree my hands) are probably some of the cleanest things in those toilets (urine containing virtually no bugs) so I consciously minimise what (and how) I touch in there. Using your elbows (for some taps) or feet to push open doors is a good habit to have and take your own small cake of soap. There should never be any compromises or shortcuts where "No. 2's" are involved but for "No. 1's" it's more likely that washing your hands afterwards exposes you to far more than you realise.
Maybe that person who just had a wee and didn't wash his hands afterwards has put much more infection control thought into it than you realised.