This board is still crawled by google's robot! Some postings here have already been archived by google. A simple robots nofollow command would do.

Spammers depend on google! if this site isn't indexed by google, the spammers will lose interest.

To deal with aggressive robots you could include a hidden link, only visible in the HTML code. Someone going to that link would have its IP address banned. This trick is used by arxiv.org. They have a hidden link: arxiv.org/IgnoreMe.

By not allowing google to crawl this site, discussions would be more private and people could use their real names.