Sorry, I don't use Facebook, and I applaud the initiative (as I understand it, it's about limiting the exposure).

I just think that the use of a such a travel mode could be likened to/misconstrued as the practice (perilous, as you indicate), of using a decoy account, given for example, some previous snapshots of any public/semipublic social media activity suddenly invisible for the border agents.

Just trying to get a clearer view of your proposition (I think I'm doing it, thanks for answering!)