I think the best I can do is to compile them here and I'll mention the manager in case he wants to consider paying them for those posts. In today's case, the manager is Little Mouse.
The best solution I think of when you don't see a positive response from your intended user after a warning is - report the post to moderator.
You can report the user to the manager, but I don't think it will change the user's behavior completely even if he is removed from the campaign. This case is only about one user - but there are many other users who behaved the same way and not all of them have a signature on their profile. I tend to report posts like that to moderators rather than managers - but you can contribute in your own way.