No guarantee on the authenticity of this letter, but it seems to fit with anons’ general style.
From the letter:
“It is here that we proclaim: Any individual, organization, corporation, and/or government entity which supports Freedom of Speech and a Free Internet is an ally of Anonymous. If you work to suppress Freedom of Expression and a Free Internet your efforts will be halted. Where others have made this promise and failed, we make this promise and aim to keep it for everyone. We would like to ask that you as a citizen, organization, media entity, or government do the same by joining us.”
You already know whose side I’m on.