The news is rife of posts of people who are getting in trouble on Facebook and twitter for posting images/stories that in a pre 9/11 mindset would have not have same consequences. But as some people are finding out Big Brother is watching and data mining sites like Facebook, twitter, MySpace and blogs (here, here and here). In some cases people are being reported as this person was.
I would caution anyone about posting questionable material on social networking sites, to include blogs, as they are putting themselves at risk for a visit from men in cheap suits. I am seriously considering divorcing myself from all social media sites as Rural Revolution did due to their tracking issues.
OpSec is a key component on what preppers do, please do not let yours be compromised by a joke or a post in anger. They do not have a sense of humor.