@vilbi I totally get that and that is why the idea is that you can subscribe and unsubscribe to one or several instances/lists that you feel matches your instance.
For example, I have a couple of instances where I just copy paste their announced block but that requires me to manually go there and check and that they don't forget to keep the list updated.
It's just an idea, I really don't know and haven't thought about it enough to know if it would be functional or not.
@kev yep, I thought about manual approval on the instance B too but never thought about that option to mark it spam or RBL, I like it.
This idea may lead to all sorts of problems that I may not be thinking about but it came to me as a way to partially automate moderation. I don't know, just wanted to put it out there for discussion :)
@kev By default an instance RBL list is empty and it works like today. If you find an instance you want to follow the moderation you can manually add the instance(s) to your list.
For example, if I trust your instance moderation I would add your instance to the list of RBLs my instance follows. Only if you block some domain, will it propagate to me.
So, unless I manually follow an RBL/instance that is trying to do something abusive, there wouldn't be any major issues I can think of.