The NSA is already intercepting all traffic. Unencrypted just makes it interesting for them. If I send a message with a link and an interactive SIP connection, the carrier may not be able to disclose data, but the person initiating the SIP session gets a lot of data if the connection completes. What could go wrong? Now I have a constant unencrypted sip connection to my phone and the microphone is listening all the time. Seriously, this thing stinks in a whole bunch of levels.