What about the fact that models effectively have access to such features without actually having them explicitly apriory. Given all the data fb/google/etc have,

What about the fact that models effectively have access to such features without actually having them explicitly apriory. Given all the data fb/google/etc have, they can probably infer these properties in high accuracy anyway. Are we going to exclude all data that correlates with these properties? Probably not, rendering this effort kind of pointless.