I had to read the first sentence of this article twice because I thought it must be a joke:
Teens, after being friended by parents, grandparents, aunts and uncles on Facebook, have moved to Twitter to get a little more privacy.
Trading Facebook for Twitter? Really?
Apparently those teens have not studied Twitter very carefully, as all tweets are entirely public; so public, in fact, that Twitter recently agreed to hand over all tweets to the Federal government and DHS, which now apparently monitors tweets for subversive activity. DHS recently denied two British tourists entry to the U.S. because of a couple of jokes they had posted on Twitter. Apparently re-posting a quote from the TV show Family Guy now marks you as a terrorist.
It may take a while longer, but I think people will eventually begin to understand that posting every trivial thought and picture from your life online is not the way to gain privacy.