Important research that shouldn’t have to be conducted this way. We are trying to make educated guesses about an important phenomenon whose creators already know how it works. https://twitter.com/samfbiddle/status/1113593808128741378 …
Microtargeting raises a number of issues that have not been dealt with. It seems Facebook ignored basic existing law on job/housing ads and protected categories for a long time, but there are also novel questions not in existing law, too. So yeah there should be guidance/law.