[hammock]

>Facebook should follow one rule - any post that is illegal should be removed. How do they decide what is illegal?

They don't. The government does. Which is why even that simple rule is submission to an external, uncontrollable force. The right approach is to sort out your own internal values (free speech, or rule of law, or whatever) and act accordingly to that internal principle.

For example, if you believe certain speech should not be censored, and officials in the country you operate in disagree, you can cease operations or fight back. This approach has been taken by many in China.

Or, if you acknowledge the legitimacy of the local government, and your values say that means ALL its edicts and claimed jurisdiction, then you might collaborate fully.

Or there might be something in the middle. The point is that your internal values guide, not anything else. Retain personal sovereignty and/or corporate responsibility.