I strongly favor end-to-end encryption, but I just don't see 'think of the children' working as an effective message in favor of anything.

I happen to believe that it was protected by the first, fourth, and ninth amendments, but I am not sure it is possible to erect permanent legal bulwarks against ever-expanding federal powers. As an example, the second amendment specifically enumerates gun rights, yet it is under constant assault. The only way I can see to protect this type of individual liberty would be to radically de-scope the federal government, but I don't think that's going to happen.

Again, I really wish I could be more optimistic, but I just don't see any realistic hope.