This is still centralized. You have 1 place that stores the trust ratings. The fact that it crowd sources the ratings doesn't change that it's centralized. I

This is still centralized. You have 1 place that stores the trust ratings. The fact that it crowd sources the ratings doesn't change that it's centralized. It also doesn't really work. You have to choose between not gettimg messages from those outside your circle of trust or getting spammed.