While I agree with you about information overload making it difficult to pinpoint any single person, they can use computers to comb the raw data with surprising efficiency.
The computer age is truly a different era of human history with different benefits and different dangers. We must learn to live with it because it is impossible to unplug ourselves.
It is almost certain that future homes will be computerized to the point that everything you do is do in your home will be recorded as “green mandates” turn off lights as you exit a room and control the thermostat to reduce heat or air where it is not needed. The technology already exists and the cost benefit already pays for itself.
Technology is a blessing and a curse.