UPDATE: I deleted my Linked-In account. Like with Facebook, it pays to delete all of your CONTENT first, and then close the account. I went on there and found that I was being endorsed by people I didn't even know, for skills I didn't even know I had. Some of the "skills" listed were apparently taken from my resume (or whatever they call it, Profile or whatever). Linked-In had me promoting myself as a "Litigator" which I am not. This is not acceptable.
The other thing is that I was "linked" to a number of people I don't know at all. I am not sure what this Linked-In website is supposed to accomplish, but it ain't doing it for me. Like I said, I think it is little more than Facebook for grown-ups (and I use that latter term loosely!).