Comment by roenxi

The technical terms for the first few in that list are sexism, ageism and racism. While it is true people do that, it is considered a bad idea because it doesn't capture reality in a productive and meaningful way. And doesn't seem relevant to keiferski's comment.

The aim should be that people have to voluntarily associate with their tribe. It might be the hermit tribe where all the hermits sign up to be alone together.