Imagine this scenario: You break up with your (seemingly) normal boyfriend or girlfriend. Everything seems cool, but then their inner crazy comes out: They hack into your Facebook account, steal personal photos, and generally make your life hell. And yes, it can happen to you: A new study found that one in 10 Americans have been cyber-threatened by an ex. And we make it easy to become a victim. A staggering 50 percent of us share our passwords with our significant others.

Source: McAfee survey, 2/4/13