Imagine a system similar to Lavabit's, but with PFS. The FBI demands the key so they can spy on one user. I'll give them the key, ban the user, and continue wi

Imagine a system similar to Lavabit's, but with PFS. The FBI demands the key so they can spy on one user. I'll give them the key, ban the user, and continue with a new key. The government then will have no plaintext of anyone's comms on my server. If they demand the new key, they'll have to have a warrant for another user, and we'll repeat the above process. If they object to the particular users being banned, or order me not to ban them, I'll shut down the server, and object in public based on the 13th Amendment [1]. They're entitled to take over the server if they want, but they're less likely to get away with compelling innocent citizens to actively perform services to help them deceive third parties. 1. "Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction."