Right, in fact, I'm suggesting that he not ignore a notice of a suit, and instead remove the app from the store. There may be a case for stopping him from continuing to sell the app, and by removing it, he eliminates that case. The case for "damages" done by selling the app up until the date of the lawsuit is a different case, and I believe a more difficult case to make than the "he's using our trademarks" case.

Since anyone can get these same broadcasts via the internet, that he is letting people get, via the internet, it is kinda hard to say he's damaged CBC's ability to distribute the broadcasts, via the internet, which they distribute for free. He can't have cut into any of their sales... so the claim that he's damaged them in some way becomes kinda tenuous.