Please clarify: I take your answer as a (fair) response to the first objection, but what about the other ("third parties would just start capturing and storing posts while you have "travel mode" off, and sell that to CBP, or whoever else wants to pay for it")?
Does that possibility worry you? Wouldn't that also put you in a position where you’re lying at the border?
The surveillance economy is not a magic thing that sees all, though. What's the specific way in which third parties end up with my email and private Facebook data?
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!)
Does that possibility worry you? Wouldn't that also put you in a position where you’re lying at the border?
edit: readability