Would it be a terrible idea to use Facebook to reveal to my family the fact that I'm an atheist?

My family is predominantly Christian; I'm sure there are a few others that are atheists as well, but I've never actually heard one of them say that they didn't believe in god. I think only a few would have serious issues with it, but I could be wrong about that. And the main reason for which this option is attractive to me is that I tend to get extremely nervous and anxious when I try to talk about these sorts of things... And anyone's welcome to answer this, whether you're an atheist or not.