would you appreciate the convenience of being targeted exactly the right ads for things you wanted and needed, if a marketing agency had the capability to read and accurately interpret your innermost thoughts at any point in time?
nevermind the fact that it's science fiction, would you find that convenient or like, deeply unsettling?
If it was opt-in, would you opt in? What if opt-in was leveraged as a way to get a lower price on your phone plan, car insurance, mortgage, credit interest, etc?