Although cute, this 'idea' is irrelevant. Even if you made the case that you weren't contravening the letter of the request, you could still be charged with obstruction of justice, should your behaviour alter the conduct of the subject(s) under scrutiny.
Fight fire with fire. Set an industry cut-off date to blackball all specialists, technicians and contractors working in these agencies from future employment in the wider commercial IT world. This will quickly remove many thousands of specialists from the surveillance field and eventually bleed it dry. The same technique will work equally well in all countries that have abusive governments...
While the 'File Savers' of the world are praying for a huge capacity removable disks that have no chemical fade-out over time, the music and film industries are quaking in their boots at the very thought of such a disk.
It hasn't happened yet but you know, just as I know, that it will!