Sounds like US citizens should have an unencrypted email signature saying: My name is XXX, I am a US citizen. My address is YYY. By the rights guaranteed by th

Sounds like US citizens should have an unencrypted email signature saying: My name is XXX, I am a US citizen. My address is YYY. By the rights guaranteed by the US Constitution and supported by federal courts, the contents of this email are encrypted, private, and require a valid warrant to be intercepted, stored, or accessed by the US government.