Sky on Tech

Why is Bell Internet Canada ( via a domain called domainnotfound.ca ) presenting a pseudo web browser 404 error message even after you opt out of their 404 domain not found service?

*** Update Nov 25, 2009 - While not 100% related to this, IT World has a good summary of a comment from ICANN (Internet Corporation for Assigned Names and Numbers) that "condemned the practice of redirecting Internet users to a third-party Web site or portal when they misspell a Web address and type a domain name that does not exist. Rather than return an error message for DNS (Domain Name System) requests for nonexistent domains, some DNS operators send back the IP (Internet Protocol) address of another domain, a process known as NXDOMAIN substitution. The target address is often a Web portal or information site." You can also see the full PDF from ICANN