Worst cases of Facebook stalking(Dan Kitwood.Getty Images)

Facebook stalking is serious: People have gone to jail for harassing ex-girlfriends, former spouses and random users. It's normal to check out someone on the social network at one point or another, as long as you stick to checking a person's profile a few times and then move on. It can get out of hand, though. Here are seven Facebook-related stalking situations you don't want to get yourself into.