"Companies should simply not be _allowed_ to target people based on categories like..." But what if they just use good enough proxies for those categories? e.g

"Companies should simply not be _allowed_ to target people based on categories like..." But what if they just use good enough proxies for those categories? e.g. "X% of people who chose these 3 hobbies have a household income of..." you are just making it so they can't leave a paper trail that points to them saying some words along those lines. They can still come up with the theory in their head and test it and end up saying "we don't target people based on household income, we just advertise to people who chose these three hobbies."