What I'm saying is that Lauda and any other user judging each user's list, and forcing their completely biased opinions is just wrong.. Like, if he wants to include someone that didn't leave a lot of feedback, and another that left local feedback, and you think that's wrong, it's YOUR BIASED opinion. Those people aren't scammers or objectively bad people, so telling another user to change his list based on your personal views is just going to centralize the system, and all lists are going to become copies of Lauda's utopia.
No one forcing here, you know very well there is exclusion (~) option. We can simply exclude them, no need to ask anyone. But I think it's better to solve by discussion here. I don't like just kick out someone suddenly. If you trust any person you can leave positive feedback's. But you should add on your custom list those user's feedback's you trust. This is the main fact. Why you need make big your exclusion list since you can solve it by discuss here ? If DT1 exclude someone then he will removed automatically, is it not centralized? Then what is the problem discuss here ? This is criteria from theymos, user must be an active member. If someone left positive feedback's a years ago and he inactive from long time then why you should add on DT list ? His positive feedback's will reflect green and there is chance happen something wrong. Nevermind if someone not leaving feedback's but he should an active member, so he will know the current situation. 
I agree that contacting a person is fine to discuss situations but giving them an ultimatum is sketchy..
Say you include Darkstar, and darkstar included zazarb, but you don't like zazarbs ratings..
You can simply exclude zazarb and not threaten to remove/exclude darkstar unless he removes zazarb, for example..
Or whoever in dt1 included zazarb..
You don't have to go to the DT1 and threaten them to remove zazarb from DT2. Just exclude zazarb yourself and leave them alone..
Wrong. There are no implicit ultimatums, you'd have to actually state 'remove X or I will have to keep you excluded' but even that doesn't have to be an ultimatum. The simpler solution is excluding both; whether he wants to resolve it or not is up to him anyways.Say you include Darkstar, and darkstar included zazarb, but you don't like zazarbs ratings..
You can simply exclude zazarb and not threaten to remove/exclude darkstar unless he removes zazarb, for example..
Or whoever in dt1 included zazarb..
You don't have to go to the DT1 and threaten them to remove zazarb from DT2. Just exclude zazarb yourself and leave them alone..