"http://www.microsoft.com/resources/howtotell/content.aspx?pg=counterfeit&displaylang=en"
"Counterfeit software is the result of unauthorized copying, reproduction, or manufacture of software products. Counterfeit software often looks authentic and is sometimes distributed in packaging that imitates the original manufacturer's packaging."
and
"Microsoft does not authorize any other Web sites to offer downloads of Microsoft software. Some of these counterfeit downloads may include viruses or broken code. The only way to download genuine Microsoft software is through Microsoft.com."
So the reason for the silence is perhaps because they already explicitly state their policy publicly.