the problem is:
(a) how do they determine that addressA is high risk?
(b) why does addressB need to know that addressA was high risk?
(c) why should addressB owner be any guilty for addressA owner?
Exactly.
Just as you when you receive fiat you are not thinking about where the money comes from, whether something illicit or not, the same is said of bitcoin.
But they don't understand this, or rather, they don't want to understand.
We, in turn, have to try to understand what they think, assess the situation and act accordingly.
As I said, in the research I've been doing, in order to get an idea of this, now it's time to try to put it into practice (soon).