Hmm, what if we keep some encrypted porn in the shell OS? "Yep, there is hidden data. Do I really need to decrypt my special folder because I really wouldn't like to? OK then, the password is.."
Disclaimer: this is all being speculative, of course. I'm not suggesting to lie to or misdirect a border guard in a real-life situation.
Disclaimer: this is all being speculative, of course. I'm not suggesting to lie to or misdirect a border guard in a real-life situation.