Here's a blog post about why we should consider leaving Facebook.
As many users will know, Facebook has changed much of its terms and conditions, most notably in the area of privacy. I was quite amazed to see how much. It would seem that the only things that you can now keep private are you birthday and contact information.
This may or may not be a problem to you if you use Facebook. On the other hand it does raise a question about who sees your data and how do you decide who can see it rather than letting the company decide that for you.
At the moment I don't particularly feel under threat, but given how many young people use Facebook, maybe we should be a little more vigilant about the erosion of privacy in social networking.