Nope. The whole point is that if advertisers want to stay away from his show CBS will see he is toxic. The new ads will be targeted in the same way. When CBS sees that ads on Letterman get in trouble, they’ll be hurt.
I agree with everything but your “Nope.” It may be because I believe more in the direct approach.
A cage fight between Lecherman and Todd Palin would garner great contributions to charity. I wonder if any freepers would contribute to pay-for-view to see that contest.