The issue is that refusing to let customs inspect your electronics is illegal. This is the broken thing. Encrypting is just a half-assed way to try to get past this (I say half-assed, because it doesn't work). I don't especially care that encrypting doesn't "look legal". I care that customs has the right to inspect the digital contents of my devices. That is a completely pointless invasion of my privacy. It doesn't reduce crime. It doesn't protect the country I'm entering. It's just an exercise of power.