[ctz]

It's worthless in the face on an active adversary, but it works very well as a countermeasure for passive mass surveillance.

I do think it's a dangerous idea, though. The difference between 'secure' and 'insecure' is (at least partially) understood by most technical and non-technical people, and sometimes they can make a good decision on their requirements. The difference between passive and active adversaries is much more subtle, and I doubt people can think this through with as much clarity.