Yeah, normally I don't just repost Atrios' stuff, but on sheer principle, it must be said:

Do not fuck with Letterman.

Assholes.

That is all.

...ok, not so fast. Click here to watch the video in question (it's very, very funny).

...I don't even watch Letterman anymore, but you don't fuck with the master. Here is a longish clip of his response -- what you could call Step 1 of the Stern-ization of Letterman, maybe.