Thanks for posting that, I'm not sure that I actually understand what any of it means
By luck rather than judgement my personal and business e-mail is via GMail, although I do have a yahoo e-mail address for access to YM.
As far as FB goes, the only people who I suspect would be remotely interested in seeing who I chat to are my ex wife and ex girlfriend. I don't put any sensitive info on there anyway. Lets be honest, do you really want FB friends who you have never met or not seen for 30+ years really knowing all of your business and contact details? I don't so I don't put it on there.
TBH if someone really wants to hack into my FB and see photo's of my cars and holidays, good luck to them, but I could save them the trouble and e-mail them to them or add them as a friend if they asked me nicely