Audible eaters.
Honest to fucking God. In what scenario EVER do you think it is pleasant for someone to listen to you chewing? Spit out your fucking gum, and when you're eating food, close your fucking mouth. There is nothing more disgusting.
And if I encounter you ANYWHERE (at a restaurant, in the movies while you smack your mouth with popcorn, on the bus while you snap your gum, or wherever you're fucking smacking and making noise with your mouth like an infant), I'm going to say something. It isn't going to be kind, and you're going to feel stupid. Because you're making noise with your mouth. Like an infant.
Fucking gross.