A couple of tweets have come from Scott Bourne (@ScottBourne) in the past couple days regarding giving up control of your images. Specifically when uploading to Facebook. This doesn't really surprise me.
I was going to tweet him back and ask for his thoughts on Creative Commons, but before I did that I thought I should search to see if he had already weighed in on the topic. And indeed he had!
What You Don’t Know About Creative Commons Could Kill You- Going Pro 2010
It was quite illuminating. I have been posting to sites with a CC license and after reading Scott's thoughts, I am rethinking that position.