Just came up with something inspired by @librarycomic for use at the very start of every meeting with the customer.

"You have the right to remain silent. Any ridiculous specs or illogical features that you say can and will be laughed at in the back project office room.
Any real questions you ask will be answered to the best of our ability, as long as they don't violate privacy or the law or the internet.
You have the right to be in a hurry or tighten the deadline, but not to expect that it will cost the project any less.
With these rights in mind, let us begin our progress meeting. On to you."

Feel free to fork and contribute! :D