I grow to dislike the concept. Notice how it focuses only on the one who wants to pursue a sexual/romantic relationship, as if platonic relationship is somehow lesser. Why don't we ever hear about the "sexual zone" or "romantic zone" about people who desire a deep platonic relationship with someone but who are placed in the "sexual/romantic zone" by that someone? It hurts to be previously friends with someone who gives you the cold shoulder once they find out you don't want to fuck them. Why should the sexual zoned person's feelings perspective and feelings be cast aside for the friend zoned person's feelings and perspective?