Facebook question...

I'm a bit disturbed by this story. For reference, I don't own a Facebook account, I decided long time ago not to have one......but I just don't know about this so called "shadow accounts"......are they include personal info of individuals who don't have Facebook accounts?.....that would be terrible, if true......anyway here's the story:

Anger mounts after Facebook's 'shadow profiles' leak in bug | ZDNet