why do employers take looking at facebook profiles of a potential employee so seriously?

[Sarah]

Omg Facebook has become such a cult its contriled and sometimes you can't get into sites unless you. Have Facebook.
They use it to take take and for research and no one thinks about what private info of yours has been, poked. Proded, looked at and stored elsewhere against your input. I don't trust the going on behind it and people came seem to lice with out it.
How many people than the ones you see regularly.or have a number stored on your phone are truely friends? It's rubbish.

And yes what toy do in your own time is your business.
In the UK we can drink from 18 but there's picks of 12, 13 year olds drinking! And they don't get deleted.