I think this kind of profiling will be done on baby-boomers and gen-xers, too, using records of purchases. I believe every US store records who buys what when. This information will never be erased. It will end up being sold to aggregators who will then be able to sell the record of everything you bought since you became an adult. Even using cash will not protect you once face recognition becomes cheap. I think the only way to prevent this scenario is with legislation, as Europe is doing.
I worked for a while for the local Equifax branch, and that's basically what they do (aggregate and process data from payment records).
In my country, they cannot do some profiling because of personal data protection laws (similar to Europe), but I understood that they do use information in that way in the U.S. .
