And this is the response I got...
"Iím glad that you have been enjoying your services with us so far, and I can certainly give you some more information regarding the Virtual Channel Override (also known as simultaneous substitution). The simultaneous substitution is in place to promote Canadian content and has been extended to all of Ontario, not just those within the Toronto viewing area. The simultaneous substitution should be a seamless transition from the US content to Canadian content, with the only differences for the most part being the advertising. We will certainly forward your concern regarding the areas that this affects.
Signal substitution is done to bring millions of advertising dollars back into the Canadian broadcasting system. The CRTC has a duty, under the Broadcasting Act, to foster a strong and financially viable domestic industry. When broadcasters buy programs from American and Canadian producers or networks, they pay for exclusive distribution rights in their home markets. The simultaneous substitution regulation, set out in the CRTC Cable Regulations, is designed to protect those rights. These regulations permit Canadian broadcasters who purchase American programming, to use signal substitution as a means to earn advertising dollars. While currently Global has begun to use simultaneous substitution, it is certainly possible for other channels to do so as well, although I do not have any information if any others will do this.
Should you have any further questions or concerns, please feel free to contact us. Please include any previous correspondence with your replies.
Thank you for choosing Shaw Direct,"
Is this even legal to do if you aren't within range of a broadcast tower?