I ****ing hate people that do that.
If you are coughing, I don't want you anywhere near me, and I certainly don't want to be touching anything you have been touching. As I see it, if you cough once in my vicinity at work, you forfeit the right to pay cash. You get your card out and you swipe it in the goddamn machine so that we do not touch any of the same things. Filthy disease-ridden pigs.
This made me laugh so much because whenever someone did it, I refused to take the money. Luckily, they mainly paid with card where I was, so it was avoided.