If you're one of those people who wants nothing to do with Facebook, maybe it's because you've heard negative stories about how it's used?  And you wouldn't exactly be wrong.  According to a survey of 1,500 women from the website Mymemory.com, one in four (25 percent) say they've deliberately uploaded "ugly photos of friends" to Facebook.

Reasons cited are retribution for a similar slight made against them and they didn't like the friend in the photo anymore.  In a nutshell, it seems it's inspired by revenge.

Let's see how spiteful you are...