I'm not MIRI affiliated, and not saying this to proudly display my banners. But when an account is labelled as destructive/trollish and it is explicitly stated that his/her comments are subject to be removed whenever encountered, then such deletions should come as no surprise.
Consider you labelled someone as a troll and wanted to dissuade him/her from having a presence at your forum. Would you need to sift through every comment of his/her checking whether it has some merit or not? That's asking for a lot and may be counter productive, allowing that person to build credibility which can then be used to have a more attentive audience when presenting the content that's considered trollish/destructive.
You're using the passive voice a lot there ... who decided these things?
If it's worth saying, but not worth its own post, even in Discussion, it goes here.