Threatening nuclear war should never be an option. Nukes are there to prevent nuclear war from happening, if that makes any sense.
a CCTV camera can't "see" your food preferencesI think cameras can be trained to detect things, especially now with better hardware. However, this probably won't be done for 99% people. At least to me, it sounds extremely niche and to be used for spying and stuff against suspects.
What data?