I have noticed a pattern.
For the last several times that I have sat down to eat at a restaurant in various airports someone has decided that it was proper etiquette to pull out a tissue and blow their nose as I was eating.
This is disgusting and causes me to lose my appetite.
With all of the bathrooms nearby couldn't these people wipe their noses in the restaurant and then go into the bathroom to blow their nose?
I don't want to imagine "snot" coming out of someone's nose as I am eating.