You're absolutely correct. They are not tracked. There is no log of those. There's just enough when you do a PIN to PIN...there will be a short record, just enough to send it to the person who will receive the messages. But with all those messages, it's not a secure way of communicating. It's totally unsecure. You're totally avoiding the network, the environment, and the security features. Really, I would not encourage members to use PIN to PIN for very, very confidential or important types of business. It's not a proper vehicle for conducting your business if you don't want that to be on the open air. It's a very, very unsecure environment.
On February 10th, 2011. See this statement in context.