[jabxyz]

An appropriately worded court order will reveal the messages and attendant identifying information. The term privacy has to be placed in context. In terms of ensuring that just you and the recipient of your message have access to it as the conversation bounces back and forth between you, BBM with it's device based PIN system is pretty good. In terms of privacy from anyone seeing the messages at anytime under any circumstances such a thing does not not now exist if it ever really did.