Book excerpt: Whether it's a means of staying in touch with old friends or of making new enemies, Facebook -- which celebrates its 7th birthday in 2011 -- is impossible to ignore... In June an Irish MEP called for Facebook to be regulated as a health hazard, in the same way as alcohol and drugs. It's not hard to see why. According to experts at top addiction clinic, The Priory, one in ten of us is in danger of becoming addicted to Facebook, and in need of psychiatric help to recover. We log on compulsively to keep tabs on our friends (and, more importantly, our enemies), we obsessively acquire 'friends', even though we might not actually know them and we develop damaging insecurities as a result of the 'perfect' selves our 'friends' portray, believing that our own lives don't measure up. Worst of all, we're so busy leading our virtual lives that we forget to lead our actual ones. So what makes this social networking site so addictively popular? Well, it's the way FB has extended into every corner of our lives, changing the way we interact with one another. This book takes a lighthearted look at the site with a mixture of real-life stories, expert comment and useful tips.