I'm so glad now I'm borderline manic with hand-gel!!
That stuff is useless for stomach bugs - but useful against the flu etc. There's a reason norovirus gets around hospitals...
Yep, soap and water is the way forward for avoiding the notorious. Or you could wear latex gloves at the table and not touch your face or food with them.
Some people are dirty bastards though. You go into the toilets and people have pissed all over the seats. How old are these people? Do they do this at home?