Not using Arsebooke at all....
... but my wife does.
Personally I am not willing to drop my pants in front of the whole internet community. Especially not as long as I don't trust Arsebook's security policy. That company is totally incompetent to develop decent code, and I don't trust it's integrity either.
Your privacy against a good standing with the authorities? Take a guess.
But that's just little tinfoil hatter me. There is basically nothing wrong with sharing your whole life on the internet- as long as you censor it a bit ;-) Everyone has full control over what they share and what not, and if you think that your life is really that interesting to the rest of the world, be my guest. What people fail to see is that there is:
NO SUCH THING AS PRIVACY ON THE INTERNET
Never was, never will be! Once you have understood this, go ahead and share whatever you like!
I am aware that there is a wealth of information about me all over the internet, indirectly through my wife's Facebook account, in this forum, and in many other places. Its inevitable if you work in IT and have public appearances over many years.
If "the powers that be" want to frame you on something they will succeed anyways. If a government goes rogue your Facebook account is your least concern.
This whole paranoia thing is like jealousy in marriage. As long as there is no reason the whole thing is ridiculous, immature and unfair to the other side. If there is a reason its too late to worry, and its time to take consequences. But apart from staying decent and not causing a situation yourself there is very little you can do to avoid it. You will have to cross that bridge once you reach it, so you might as well ditch irrational paranoia and just live your life.
P.S: This is not an appeal to neglect ones social and political responsibilities! But in my experience the biggest conspiracy theorists and other paranoia addicts are the least active where it matters and don't even try to make a constructive change to anything.