A group of people with the intention of privately sharing details of people in order to track their behavior is definitely going to lead to doxxing. Maybe I'm getting the wrong idea, but it sounds like they are sharing the names of people they went on dates with. I assume that would include the city or town the date occurred which would infer where abouts they live. Given enough "reviews" of a single person I'm sure there would be sufficient info to call it doxxing.