Especially at this age picking your friends at school is really important for the rest of your educative career. Although it may seem cool to hang out with the bad kids who get in trouble at class and make everyone laugh when they act up, I know that as I went through school, these kinds of kids mostly either fell behind, or by the end dropped out. Sometimes it's worth being seen as a 'nerd' just for the benefits you'll receive down the line
Yep. Most of them smoke "weed" (leaves) or smoke weed (actual weed). How they got it i will never know. Person A will probably die of a heart attack before he can even get a job.
Modern streyotypes. Everyone loves the douche, but no one likes the nice person.