Those deed covenants go back to the KKK and whites-only policies imposed by the builder during lot subdivision. The game-theory doesn't work for retroactively

Those deed covenants go back to the KKK and whites-only policies imposed by the builder during lot subdivision. The game-theory doesn't work for retroactively imposing them on your neighbours. Why would someone selling promise to give up upside when they are moving away anyway? Like, are Anderson and Curry gonna show up on your lawn at midnight in hoods?