The dangers of using social media when hiring staff

I thought this video was fascinating. On one hand, you don't want a job where you have to completely hide who you are as a person and try to assimilate into a work culture that doesn't fit you. But on the other hand, it is a job indeed so just like you would want to refrain from being too outspoken at work, it doesn't help if your Twitter, Facebook, or MySpace page is out of control. Personally I wouldn't want to know what was on someone's FB or Twitter page before hiring them. I just want to know if they can do the job. What they do off the clock is on them. But that KKK comment sure did catch my attention because I would cringe in my seat if I hired someone who thought the KKK was a great group of people. *shrug* I guess it depends on the company. I've worked for companies that could've cared less about being politically correct and then for others who were very aware of their surroundings.