Lying to Your Friends
I don’t think anyone is perfectly honest about who they are and what they do on facebook. Your interests don’t always reflect what you do on a day to day basis. So you like skateboarding, playing guitar and generally looking cool but that’s not really you. You really only put the things that people will gravitate to and leave out embarrassment things like “passing out in a recliner drunk with a bag of cheetos”.
I like to think of facebook as this game where you try to see who can fabricate the most believable lie in a competition to see who has the best “life”. It’s like permanently showing off vacation photos with everyone you work with, “You see this? I’m jumping off a giant rock into a gorgeous hidden bay in Oregon. Oh you were here working and eating ramen noodles while I was having that much fun? That sucks for you.”