When I worked for an advertising network (a little guy compared to the duopoly of Google/Facebook), we had a request from an advertising agency for: Women, 25-35, Latino, in the greater Los Angeles area, who have 2 children and are expecting their 3rd child. Creepy is an understatement.
The other part of the industry which was extremely upsetting was the amount of racism. Ad agencies will make blacklists of both domains and/or keywords where they don’t want any of their ads to run - regardless of campaign. There are many things on the list which are related to terroism/crime/etc, but there are some which are directly about race - keywords like “black”, “ebony”, “asian”. It is depressing to say the least.