If we're being humorous, then a big red circle with the diagonal stripe across it would be the international symbol for "No Pay TV". -
If we're being serious, then I have to agree with Toucan-Man.
However, much as another poster who lettered his dish with something like: "
Bite Me, DirecTV", I don't think anyone really cares.

(I ain't namin' no names, but we regulars remember a good picture!) -