Alcoholics. A recent article in Time reports that heavy drinkers live longer than nondrinkers. Moderate drinkers faired the best. But the finding that heavy drinkers came in second - above teetotalers - stunned many.
The term "cell phone etiquette" is easy enough to Google and everyone seems to agree on what the rules are - for other people. Here is my list. And I actually practice what I preach.
Riding public transportation to work can provide one with interesting observations of human behavior. In watching people riding the city bus, I immediately become aware of a culture of helping behavior that I don't see in other places. I experience a sense of camaraderie and community and feel more joined with humankind on the bus. This is great contrast to the battle against my fellow citizens I engage in when I try to fight my way through traffic to drive to work.