Looking at novellof's profile and his most recent posts, I don't see any reason why he should have been banned either. All of his posts are civil and he's not breaking any rules or anything.
Very strange. I honestly don't know why this happened.
It's easy to get new people banned. Probably too easy. All it takes is a few reports from someone with a lot of posts. At least that's what I think. This happened when I reported some of vlad from moscow's posts for reasons I don't fully remember. http://www.cplusplus.com/forum/lounge/111264/
If a post is the last post in a thread it is often automatically removed when reported so that could explain why we don't see any of the posts that got him banned.