He might be spamming, but you're not helping the situation by replying to EVERY post.
Please just let the posts pass quietly through the forums.
Rules are just out there for the HELL of it if there ar no consequences. Trying to keep someone inline in a public lobby full of people without face or identification is likely impossible. Policing the internet is impossible within the country which is deeply rooted in Democracy. Whoever if you were to live in the great nation of North Korea for instance the internet is greatly controlled and manipulated as the government pleases and the consequence is the firing squad. Any last request?