I think this a good idea, if advertise bitcoin on t.v because if it watch of everyone, it will sure they become interested. Because others people don't know about bitcoin, and this is the good way to introduce people around the world about bitcoin. It will spread all over the country, it will recognize by people. Maybe this way all people over the world will invest in bitcoin. If all people already invest the government will support also.
This would be an good idea, but the problem is who's gooing to pay for it. Ads are expensive, be it in hardcopy, traditional or online media, and from what I understood the Bitcoin foundation is solely for minor promotions + subsidize the developers. However if the community would make a stand this can be done easily. Just look how much ico's raise these days.