I'm not aware of high karma affecting how we do HN moderation. We ask people not to break the rules when we see them breaking the rules. Sometimes we reply to everyone in a thread who did that, but not always—perfect consistency isn't possible. Nor is it necessary, because someone else breaking the rules doesn't make it ok for you to break them: https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que....
Not every downvote or flag comes from reading the thread. There are also pages like https://news.ycombinator.com/newcomments and https://news.ycombinator.com/noobcomments.