I don't think there's even a technical way to do this anymore. Digital ads are not actually audiences anymore (bundles of people labeled a certain way).
IMO the regulation needs to be at the data collection side: advertisers should only be able to collect data on a defined set of dimensions and each dimension should have a defined maximum specificity. Then beyond those, advertising platforms need to compete on making their actual products more compelling rather than making them better at sucking up data.
IMO the regulation needs to be at the data collection side: advertisers should only be able to collect data on a defined set of dimensions and each dimension should have a defined maximum specificity. Then beyond those, advertising platforms need to compete on making their actual products more compelling rather than making them better at sucking up data.