What you should worry about though, is what you make public on facebook.

I am a Landlord and have an apartment that people can lease. I have a few bylaws that I want people to follow and one of them is no smoking inside. I am not discriminating against smokers, but I don't let out to untrustworthy people.
I usually check out the people interested in the apartment and if they tell me they never party and are non-smokers and I find their public facebook profile full of pictures of parties and the person with a cigarette in the mouth, I am inclined to think that I have been lied to.

Heh.. the other day I had a guy wanting the apartment. He said he played a little guitar. Checking his facebook profile I discovered that he was in a rock band.
Needles to say ...

Also... be careful using your full name on the Internet.
A soon to be mother went from first on my list to second based on something she wrote on a blog a few years back using her full name.
People making decisions might have candidates that are equal and base their choice on gut feelings and impressions. It could be a minor thing that shifts the choice in favour of the other guy.