I call out my family when they don't wash their hands after going to the toilet but I just don't do it with strangers. However, I have a mental list of most of the people who don't do it and I avoid giving them my utensils/stationary even if it's visible by saying nope sorry. If you don't have the decency to have simple hygiene, I won't show the courtesy to supply you with the stuff that i have to touch later on
It's vile though. I saw someone come out after pooping and not wash their hands and it was GROSS

I won't associate myself with that.