This statement: "Newly disclosed documents prepared by IRS lawyers says that Americans enjoy 'generally no privacy' in their e-mail, Facebook chats, Twitter direct messages, and similar online communications" is entirely consistent with the existence of Warshack. Warshack covers the Sixth Circuit, which includes the following states: Kentucky, Michigan, Ohio, and Tennessee. The IRS is bound by this precedent in those…
> You send a clear-text message to a publically-accessible service that is empowered to forward the message to other publically-accessible servers if necessary. This is how postal system works.
In the postal system, your message is generally encapsulated in a tamper-evident envelope, carried in locked cars and trucks that enjoy Federal protection against intrusion, and end up in mailboxes that are almost always on private property and/or locked.