Think about the implications. Do you really want everyone in the US military to be trackable? There are various ways to track people, and I will not go into them on a public forum, but think long and hard about what you are asking. Would you want to be trackable everywhere you go?
The simple solution to the problem is to use proper tactics and don't get yourself put in a position where you can get kidnapped. Remember the convoy that was ambushed shortly after we went into Iraq? They wouldn't have been abducted if they wouldn't have gotten lost and driven through the same area three times. Common sense goes a long way.
Good point. I suppose it is ineveitable that our technology would fall into enemy hands.
There is already a method of detecting US military uniforms (to protect our soldiers from friendly fire). We are so much more technologically advanced I wish it helped us more.
It would seem that the device could and should remain in an "off" position until needed.
Years ago, spys had a nitro or poison capsule that they could bite down upon in the event they were captured or tortured.
In today's age, a soldier surrounded by enemies could activate the homing device in some manner in case of extreme emergency.
Even if the device only worked for 48 hours, it should be enough to track and locate and rescue.