Your friends are not the only ones that twitter you or talk on facebook
http://finance.yahoo.com/news/When-tweets-can-make-you-a-apf-2661969609.html?x=0
use common since when posting
private your pages, dont post stupid things, and know they can be looked at anyway!
I don't know how I've gotten along without facebooking or tweeting, lo these many years.
Alas, I carry on.