The Disgusting Little Things That People Do: http://youtu.be/5c5t9kP04dw
Omg! I can't even start to explain how poor people's manners have gotten. It's like nobody teaches their children etiquette anymore. The world doesn't want to hear you eating your food or sucking on your drink or sucking the food out of your teeth. It's just ridiculous.
Chew with your mouth closed. Hygiene is taken care of in the bathroom. And for Pete's Sake, clean up after yourself!