Everyone hating on social networks needs to get over themselves and stop smelling their own farts, seriously. Social networks are a great way to plan events, share photos, or keep in contact with business contacts. I use Google+ to stay in contact with every other game developer I know, and it helps me meet new ones too. Twitter is cool for quick updates, and I use it, but it doesn't really let you meet new people like Facebook, or better yet, Google+ do.
Yes people can make social networks look super lame, but have you ever been to a great bar that's just crowded with a bunch of losers? I know I have. Don't hate on the service, hate on people messing it all up. Social networking sites are great if used properly, blame humanity and people specifically for whatever gripes you have with them. As for thinking you're "cool", or above other people for NOT using them, get the f@#k over yourself, and throw your mac out the window while you're at it.