How to build a trope
before your very eyes.
We're on a tech site here, so have a fairly good grasp of the issues involved. That leaves the other 95% of society (who, for better or for worse have been allowed the vote) who, when pressed, would probably tell you that Encryption is in New Jersey, and no one made salted hashes like Grandma.
If people like Comey raise the "encryption is bad" meme, and use it in proximity to words like "child porn", "paedophiles", "terrorists", "islamist" enough times, he might just get enough support to get his way.