To backtrack, the bacterial/viral profile is what's of concern here (he said, pretending to be scientific). I have heard or read that the bacteria around a kitchen sink is often more hazardous than that in a toilet, more variety and more hazards. The public toilet in a bar makes this more hazardous, with more people contributing a wider array of bacteria and viruses, and in a bar, not just feces but also vomit and who knows what. So if ever a pipe needed an intense cleaning, all the way around, this one might. There's also the aesthetics of smoking a pipe associated in your mind with a public toilet. A lot of men would make a point of not caring about this, and showing themselves what tough old birds they are. For others, that pipe might just never taste the same, no matter how it is cleaned. If it was one of my treasured pipes, I might clean it throughly, and then clean it thoroughly again. If it were more ordinary, I might send it to the trash. I wouldn't sell it, gift it, or donate it, if it wasn't something I'd smoke, even knowing others would. A pipe owner should have the choice.