I'd wager he had conditions placed upon him against social media use last time he was released, and again this time around. It would explain both his immediate re-admittance before, and him changing his privacy settings at this point.
If my hunch is right, it's highly doubtful that he'll get away with it, but obviously he can't restrain himself and changing the settings to "friends only" seems like exactly the kind of inept, half-assed measure I'd expect him to try under such circumstances (and not something I'd expect him to do without being compelled).