Somewhat along the lines of being followed on Twitter by TV characters, PSFK has a couple of interesting posts on social media worth checking out:
FriendFeed lets you pose like you’re following someone when you really aren’t.
What exactly to all these Facebook status updates and Twitterings add up to? Does this Ambient Social Activity provide real benefits? What does all this passively active behaviour mean for brands? (The second link is to Noah Brier).