I'm so glad that you asked this question, (not that I can answer it properly) but because our lovely Char and Julie Gobern have asked me in the recent past to sign in as their friend and after logging on to 'facebook' I was faced by a daunting array of questions about me which I declined to answer.
I am not being fair to the blog in that I have not tried it but on first impression, I think I can live without it.
A big sorry to Char and Julie.