Just found in my google webmaster tools this url as not found

"warning_this_is_english_domain_to_solve_this_probl em_submit_site_in_atoall.com.html"

I did a little search and find this odd page is added to many many sites.
Found also this little article about it.

blog.colnect.com/2009/12/new-spam-technique-warningthisisenglish.html

Have you every experienced something like this?

Do I have to act, or should I just let it since google anyways dont find it and gets a 404 error for my site when looking for this url.