Social Networking Rule No. 1: Don’t Be Stupid

It has never been easier to get in trouble while catching up with friends. Social networking sites such as Facebook and MySpace are great ways to reconnect with old acquaintances and meet new ones. But posts can be problems — the work rant you didn’t expect the boss to see or the photos your old roommate posted that document your familiarity with keg stands. More than 70 million users have registered online for Facebook accounts this year alone. With recent college graduates, older professionals and other adults flocking to the site, some are learning hard lessons.