Doesn't this whole situation and the threat thereof go away for 99.9% of the population if we decriminalize possession / "viewing" of child pornography? [Note: you could still be severely prosecuted for making it]
There doesn't appear to be anything else in the digital realm that can get you in such legal trouble. The only other thing I could think of is national defense espionage, or rogue WMD plans. And on these counts, 99.9% of people are going to be very difficult to put a plausible frame job for these crimes. Sure the 0.1% with security clearance could be framed here, but as far as I understand, that's a personal decision and risk each person go to make for themselves.
If you deny the prosecution the ability to use reasonable suspicion of CP to search, or compel a decryption of your digital files, it's going to be a long time before another case like this.