>A country or federal state is just a company with a monopoly over law in a certain geographical region. Facebook's "monopoly" is at least subject to the whim of the market, as the Delete Facebook campaign shows.
Not really. In countries with representative government not only does that state have a monopoly on law/force but all people are granted an equal say in the state. The market may be good at some things but would you desire a governmental system where the rich having more power than the poor was baked into the system? [0] I think most would resist that.
>We can all opt out of Facebook. Thankfully many have. But NSA surveillance is involuntary.
Well actually we can't. We've found out recently that Facebook tracks even non-users. Besides you could go so far as to say that you can opt out of NSA surveillance by rejecting email and cell phones. Even if your work requires an email and a business phone you're certainly not required to share personal information over them. So what makes surveillance of your private emails more involuntary than surveillance of your private FB messages?
>Why are we more worried about a voluntary and foreseeable risk than an involuntary rights violation?
I think if you went around and asked regular people with Facebook accounts whether they voluntarily gave fine detail location data and browsing histories to Facebook they would reject that. Certainly they would reject foreseeability.
Further I'm not sure you can even call rule by market regime more voluntary than rule by representative government. Both require loads of coercion.
[0] I'm aware that our own representative democracies have been corroded by the effects of wealth but there is at least a path towards eliminating that influence. In a market system there isn't, it's the core feature of the market.