Also, if MP did join DS, the terms and conditions people signed up to Metropol would no longer be valid, and users would be perfectly within their rights to demand personally identifiable information about themselves be removed.
It's a forum on t'internet! I think you need to take a deep breath and consider how bad that post is!
It is a static page hosted on the Metropol server and assigned to be the default 403 error page. The presence of the "<base href" tag to reference digital spy pages with relative links is evidence of this.