This is our main tax information forum which deals with topics concerning Canadians living and working in the U.S., U.S. citizens contemplating working in Canada, and all aspects of Canadian and U.S. income tax and related adminstrative issues.
Look up top of the forum page and it has a link to the moderator (Mr Serbinski). I used that to email him about the recent spam outburst, which has since been cleaned up. Possibly others sent email as well. Anyway, that's the way to do it.