Whoops

So far, we have discussed Facebook legal faux pas done with intent. But that's not the only way the social network can land you in jail. In 2007, a time when Facebook use was still in its infancy, a 37-year-old U.K. man joined the site to look at a friend's photos. But after signing up, Facebook automatically sent a friend request on his behalf to every email in his address book. Regrettably, this included his estranged wife, who happened to have a court injunction prohibiting her husband from contacting her. For that goof, the unwitting Facebook user was jailed for seven days.

* Bing: How to tell you're spending too much time on Facebook