It's a tricky one. i love the idea of saying what ever you want. there is no problem with defamation of the brand in my opinion as clearly one is tongue in cheek.
The thing that I am worried about is that they are sold for profit. Is this where the law gets starchy about what is right and wrong? I am not sure, but would love to hear what you think is the right way to go.
Personally, I hope they sell millions, rip off everyone and retire fat.