The variety of modes and manners in which technology can assist our evaluation efforts is expanding very rapidly and working on insinuating devices into every nook and cranny of our being. Potentially this is a great boon to expanding the scope and enhancing the precision of our data generation and subsequent insight into the dimensions we seek to assess. On the other hand, should we be deploying these gadgets into what may be private and intrusive areas of our evaluatees lives? Is what we can do crossing the line which governs what we ought to do? Looking at, especially, the biometric tracking sensors becoming available, their capabilities and vulnerabilities, we address the disclosure and ethical concerns building on the increasing body of guidelines and law building around the existing GPS tracking and the use of RFID tags to monitor behavior in evaluative efforts.