I agree that such a thread model makes things difficult, however I'd like to believe that it can be solved for. Regardless, there is value in hiding your communications from mass, non-targeted surveillance.
If you're able to completely "solve for" the threat model of NSA/FBI/GCHQ/CIA/etc. having a serious and persistent interest in you, and knowing where you sleep at night, my hat's off to you. Few people are that confident.
I never implied that I could! Anyway, my comment was concerning communications. Physical security is another matter. I must have missed that portion of your OP.
