I think these dirty habbits are away of life throughout the general public and not a jw only thing.
For example I work in the emergency services field, and I see repeatedly firemen, including fire commanders, take a piss or a dump and just walkout of the toilet withoutwashing their hands. These are airport fireys and are resposable for first call first aid over the entire airport and surrounding land.
Don't trust anyone, that, they are going to be clean.
My advise, keep a number of hand sanitizers handy