This is deplorable and hopefully some day grounds for prosecution by the people who were targeted and manipulated.
Aka all of them? I agree this is despicable, but I’m curious how you make this illegal and not all of advertising.
Banning targeting via email address, birth date, name and other personal identifiers would go a really really long way.
I work for a tracking company and I know how much power marketing folks have nowadays. It’s scary precise.