This is still going on?! D: If it helps, you should be able to ban someone from commenting on your games (one game at a time) including devlogs. Worst case, it's possible to disable all comments on each devlog post. And I've reminded our admins about this issue again.
Yes, and I have been banning him from my news posts, I'll see what I can do to disable the comments on those as well as my dev logs.
Right now it's on the back burner of my mind since right now an issue has come up with a project related to Newgrounds that I've been a part of that's a bit more concerning than I want to admit, but that's another story all together.