Thanks a lot! I looked this up and, sure enough, the fob transmitter is activated only upon someone touching the door handle. The transmitter in the car then queries the key with a low frequency transmission (<125 Hz) and the key answers with high frequency (>315 Hz). So the answer is clear - the key will not be transmitting anything from the back of my closet unless I drive the car there with the other key, put that one some distance away, then touch the door handle. I am presently considering tearing out all the external walls in my house just due to mild OCD, even given that I just received a new key in the mail today. All I have left to do is pay another $120 to get this one programmed. I'm also going to buy a couple of iPhone operated locators!