Facebook Reasserts Posts Can Be Used to Advertise. So if I click "Like" on a new offering by Encyclopedia Britannica, my Facebook friends (friends of friends of friends?) will see that in their ad stream and EB will be charged a click fee.
Since my Facebook friends and family members are into sex dolls and bondage they'll be terribly offended by my boring tastes and stop sending me party invitations.
It's the same story with Google+ of course, but G+ isn't a Problem. That's because by the time G+ came out we all knew the rules of the game. My 2011 TrueName G+ account lasted about two weeks; I use G+ services today through my John Gordon and corporate/professional identities.
The Facebook Problem is that I started using it when I was young and stupid - and I still value it. It's been a good way to keep our distant family members connected, and keep connections to old friends. Facebook Pages have worked well for the kids sports teams and especially for following notifications from local non-profits, selected businesses, and government.
So... a bit of a conundrum. Were I to start using Facenbook today I'd use a 3rd synthetic identity, bringing the total  to four (each of these has its own Chrome Profile - which works better on Windows than OS X)
- Public geek: John Gordon. (Once we'd have said "intellectual", but geek is less pretentious and certainly accurate in my case.) I switched my blogs from my TrueName to John Gordon in June 2005.
- Corporate-Net/Professional: Today that's LinkedIn and a G+ account at this time.
- TrueName: This is John Gordon F.... Once it led to a web site, an Amazon account and a Google Profile. Most of those are gone.
- FriendsAndFamily: Something like John Lanan -- where the last name might be somewhat unique but not too unique.
 My TrueName is fairly unusual, but happily there's now an actor with the same name. He's almost as handsome as I am, and his images have swamped mine. It didn't take long for Google to more or less forget about me, the dominant hit with my TrueName is my public LinkedIn profile.
 Charlie has a popular Twitter account and might worry about where Twitter is going, but as an professional writer he can't separate his professional and personal identities as easily as I can. I think he's always considered his Twitter identity to be both a professional and public intellectual identity.
 I'm simplifying. My iPhone's user-resettable advertising identifier is an effective identity, and iCloud/AppleID is a non-public identity related to a set of services not including email.
- A retrospective view of Microsoft's Hailstorm 5/2005: Once controversial, now quaint, even noble.
- Google's two factor authentication and why you need four OpenID accounts 9/2010. Credentials organized by security, which is a different dimension from identity organized by privacy. Not that the multi-dimensional identity-credential intersection is complicated or anything. My 2013 hacked Adobe credentials were Category I: "You want it? Take it." My mysterious 9/2010 Gmail account hack was Category IV.
- My Google profile -- another brick in the wall 12/2007. Before G+ I was 113810027503326386174, that identity link is now dead; it may have died when I turned of G+ on my TrueName account.
- Gordon's Notes: Why the name change? 6/2005
- Gordon's Notes: The Buzz profile problem: I am Legion 2/2010 - Google's first TrueName attempt. I like that old post of mine.
Update: As part of my migration I made a Facebook profile picture which no doubt violates TOS.
Here's the latest iteration -- my first ever use of Acorn.app (and not quite kosher because it's a section of an Apple owned desktop image, but I'm iterating...)