By now you may have heard of the “25 Random Things” phenomenon that has swept Facebook and been written about in The News York Times, CNN and the Wall Street Journal. The idea is not new; it takes a page from the old chain letters that circulated on the Internet in its early days, but it has really taken off. The concept is that your friends write 25 things about themselves that they then send to you in hope of learning 25 things about you. Some have used this as a forum to spill their guts, while others have...