I too am one that does not show my face. While I envy and admire those that can say "the hell with it, I am doing what I want", I simply have not reached that stage of my life yet. I work in a professional position dealing with the public and do not really need the added drama of wondering if someone recognized me. That said, I have already had 2 male coworkers recognize me from my Flickr pics even with the blurs. I suppose anyone that knows you pretty well can still figure out its you, but at least the blur gives some deniability. I appreciate the people that show it all and certainly they make for a much more complete pic, but for now I am content to show what I am comfortable with knowing some people will not like it. I think anyone that shares themselves like this deserves credit and the people that put it all out there are truly special.