Well, it's basically true though.
http://digg.com/video/guy-freaks-peo...al-information
People can learn a lot about people through social media. Jobs check out social media before hiring people, because they can get info they would not normally or legally be able to obtain elsewhere, similar to spyware. Jobs fire people over social media all the time as well, because they are using it to spy on you. I know of 2 people who lost their jobs this way.
My wife's sister used to work at a Deli. One morning, she was opening and got there to see a bong just sitting on the sidewalk in front of the store. She thought it funny and posted a picture of it on her facebook. She got fired because the picture included both the bong and their logo.
One of my former warehouse employee's son worked at a call center. He requested a certain day off, more than a month in advance, for his son's birthday party. He was given the day off, but then later told he needed to come in anyway. He called in sick but his mother-in-law took a picture of him and tagged him on Facebook during the party. He got fired.
It's not a tin hat thing, it's simply the truth. People are all concerned about privacy all the time, yet share all their personal moments on Facebook and are surprised when people know that info.