Think Geek publishes "the best-ever cease and desist letter":
First, it's 12 pages long and very well-researched (except on one point); it even includes screengrabs of the offending item from our site. And we know they're not messing around because they invested in the best and brightest legal minds. But what makes this cease and desist so very, very special is that it's for a fake product we launched for April Fool's day. It wasn't the iCade, or the Dharma Initiative Clock, or even the Tribbles 'n' Bits Breakfast Cereal. No, it was the Canned Unicorn Meat.
The very special but also very real letter is from the National Pork Board, who claims we're infringing on the slogan "The Other White Meat," a slogan they're apparently thinking about phasing out anyways.
A great sentence:
We'd like to publicly apologize to the NPB for the confusion over unicorn and pork--and for their awkward extended pause on the phone after we had explained our unicorn meat doesn't actually exist.