Well, your suggestion is true, But, Most people are not that organized, and to do the different level of separation, they must know that there are different lev

Well, your suggestion is true, But, Most people are not that organized, and to do the different level of separation, they must know that there are different level of trust, which most users won't know. My suggestion was to bake it into product, not leaving it upto users to learn a new things.