I had that thought as well. From poking around various IP law sites, DMCA is purely for copyright infringement, and can possibly open you up to more liability if you try to use it for trademark claims (what this would be), see http://www.lexology.com/library/detail.aspx?g=13f9814f-b56e-... for an example.

If Comcast wanted to take this down, it would be through a trademark infringement claim.

(IANAL, etc, etc)