Logging out of Facbook is not enough
I use 2 very simple adblock plus rules that deactivate all of facebook outside of the facebook website. Simple and straightforward and works fine for me.It might not be enough, though :DSomething like, for FireFox, IIRC:  ||facebook.*$domain=~facebook.com|~127.0.0.1
  ||fbcdn.net/*$domain=~facebook.com

And for Chrome, I think it would become:  *.facebook.*$domain=~facebook.com|~127.0.0.1

Edit: adding the rules