There aren't that many rules, and even fewer that need regular application. You can probably guess in 90% of cases.
If what people are expecting is a quoting of the remarks that shouldn't have been put up in the first place, that's not going to happen.
I think it's more a case of, if you're in the middle of a conversation in a completely unrelated thread to where the actions that caused the ban took place, and then suddenly that poster is banned.
I don't think it necessarily needs to be a dedicated thread since that original thread became a subject of its own thread which became disruptive and argumentative; nor should you be expected to reproduce material that had to be removed from the forum in the first place, but at the same time if somebody is innocently requesting clarification, it seems a bit Kafkaesque to not be able to be informed of the rules that are broken lest we fall foul of them ourselves, especially if these pertain to rules of interpretation as to what oversteps the mark.
I get that we don't want a bearpit of people arguing over moderation decisions or demanding posters they agree with be reinstated or posters they disagree with be banned, but at the same time, I don't often go into some very long threads, especially rider-specific ones, while conversation moves very quickly during major races, especially stages where a lot is happening, and so comments that may have had consequences can easily be missed or overlooked at the time, so (if on request only) a simple, appropriately vague response like "[poster X] is on a short cool-off for losing their temper in a race thread" or "[poster Y] is on a longer-term vacation for getting way too personal with another poster", maybe just even "[poster Z] continued patterns of posting they'd already been warned about" would go a long way to assuaging concerns, I feel. No need to reproduce offensive comments, or level accusations of trolling which is always subjective (and hell, sometimes can be done in a good-natured fashion in and of itself).
Take something like the Race Design Thread for example. That thread has had pretty much zero trolling nor bad tempered arguments at all, it's very much not a kind of environment or discussion topic that lends itself to that other than possibly some political disagreement or another and even that was minimal at most. Railxmig was a frequent and illuminating poster in there, and I had some decent discussion with them on the subject of course design principles and ideas, and then one day they were banned. Now, I
did see the comments for which they were banned, so I do understand it, but we were mid-discussion in another thread, had I not seen what they were banned for, it would have been unclear whether or not conversation could or would continue, as a short cooling-off ban would not have been disruptive to the flow of discussion in a slow-moving thread like the Race Design Thread, but obviously a longer-term or permanent ban would.