I saw this on tv the other day.  I have mixed emotions about it.  As an employer, it must be really hard to find good, honest, reliable employees.  I see it when I go shopping or the doctors office.  Some employers have very high turnover for a number of reasons.

If an employer is looking for someone to fill a position that requires the employee to handle clients, money or an executive position, the employer would want to make sure the employee is fit for the position.  It is so easy to dummy a resume; they may need more information.

Someone may present his/her self as an honest, maybe family type of person, but on their facebook page, they are dressed provocatively and swigging from a keg.

On the other hand, a person does have a right to post what they wish on their page and shouldn't have it held against them because Facebook and MySpace are basically for fun.