*If I said:
Given my experience of (whoever I'm talking to) as a person, the way I have seen you treat others and the things you have said over time regarding your estrangement, I can see you are clearly abusive and you are likely responsible for your own estrangement.
It would totally get deleted
So maybe it's not me being passive aggressive, maybe it's just me trying to put things as nicely as possible*
I don't think that example would be passive aggressive, although of course others may disagree. I'm not really sure its putting things nicely either as it is directly labelling another poster who one hasn't met, don't know and even though one may have valid views about their behaviour (from ones own experiences etc) it is making a very personal judgement on a public forum. I would view that statement in the same way as I view saying someone is "damaged" on a public forum, for the same reasons
In the past I have seen some very effective posts and also (I hope) done some myself, referencing very specific descriptions of behaviour by a poster and then pointing out a view politely on why the response to it has been what it has been by whoever is estranging/seen as a problem or whatever. Done that way, posts are not deleted because they are not personal, just descriptive and then giving a view on the consequences. That sounds a bit simplistic but I think you probably get the gist of the point
Regarding the other things you mention, although I agree with you that I have seen at least some of those things happen (not saying the others didn't, I just haven't seen them) I have seen them happen to a wider set of posters than EAC.
As I have said many times before I tend to focus on the points being made not on the poster making them. It is not my place to judge them/label them as an "abuser", or "damaged" or otherwise. To me posters can agree or disagree, debate, tell each other if they think something done/said is unfair or wrong and that is not the same thing