The Onion made a video all about overprotective parents who want to keep an eye on their kids by stalking them on Facebook and Twitter. Keep in mind the video is meant to be comedy, and yet it rings so true.
My favorite lines from the E-mom were:

“With the Facebook feature called tagging I can find out she is Jenny Longman just by scrolling over her … I can get a good enough idea of what she’s like just by looking at this trampy picture.”

And with Twitter, E-mom advises parents to pick a Twitter name with their kid’s college year and:

“just make sure that you spell everything wrong and swear alot.”

I’m starting to wonder how many parents are really posing as "friends" or "followers."