If that works, it would solve the problem, but it would also remove the plausible deniability argument, as it proves that you could find out what you were storing, with a reasonable effort.

Reasonable efforts are reasonable.

I feel like the encryption damages the potential without adding anything, since it can't be securely encrypted without making it impossible for the public to rebuild it. Encryption adds value if only the person who receives the package can open it, or you are trying to circumvent censorship in-transit. We already automatically encrypt in-transit relay communations, tho, and these aren't only meant to be pay-per-view, or something.

But maybe I'm just confused and missing the point of encryption, in this use case.