There are multiple elements to unpack here. The obvious pre-crime problem other commenters raise. The fact that terrorism is such a rare risk it isn't worthy of our attention.
But I'd like to raise another objection: Homomorphic encryption does not provide integrity over the ciphertext, which could open the door to active attacks against the systems that undermine its privacy goals.
If you really need to build such a dangerous and needless system, would you want it to be built with such an error-prone cryptographic design? I'd say "No".
But I'd like to raise another objection: Homomorphic encryption does not provide integrity over the ciphertext, which could open the door to active attacks against the systems that undermine its privacy goals.
https://news.ycombinator.com/item?id=14443191
https://paragonie.com/blog/2016/08/crypto-misnomers-zero-kno...
If you really need to build such a dangerous and needless system, would you want it to be built with such an error-prone cryptographic design? I'd say "No".