I tend to see teens (and early 20s, my age) going one of two ways these days.
You get the ones drinking, doing drugs and banging eachother fairly regularly, but you also get their polar opposite - the ones who sit behind a computer all day just social networking. It's bloody terrible, few of them even bother working.
What I miss were the years a few years back where the Internet wasn't as highly regarded and everyone'd be huddled around a Nintendo 64 or a pool table or something socialising properly. It's become rare for me these days. I get a night once every week or two hanging with the lads or having a poker night, but a good many people are too hung up on their vice of choice be it drugs or a computer to do anything worthwhile.