This doesn’t seem appropriate, so I hope it’s not true and is just some hysteria.  I would expect that all published info could to be taken into account in a hiring decision.

Employers who check out job candidates on MySpace could be legally liable | View from the Cubicle | TechRepublic.com
If a potential employer uses a social networking site to check out a job candidate and then rejects that person based on what they see, he or she could be charged with discrimination.