IMHO this would require a "I did not provide consent" button to keep the ad publishers (i.e. Facebook's paying customers) honest. There will obviously be many p

IMHO this would require a "I did not provide consent" button to keep the ad publishers (i.e. Facebook's paying customers) honest. There will obviously be many people clicking this "incorrectly" but much like your spamfilter, FB should eventually learn this user x really doesn't want to hear about this company anymore. Not that this is likely to ever happen, given the we are the product, not the user.