A company tries to prejudge who is a criminal, or an extremist, or whatever, or will become one of those things, based on people's Facebook social links.

The people that you communicate with on line tend to influence your actions. Therefore, trying to predict what you will do (for instance, commit crimes or not) based on such links ought to be more accurate than chance.

Nonetheless, it is wrong to prejudge people that way. We have to judge people based on what they actually do, not based on what they seemed likely to do.