There are a number of ways of using a SPOT device.  But one is (as others have mentioned) to bury it in a pack and onlyuse it if a call for help if that is needed.  In that sense, is it not essentially just another tool in your emergency medical kit.  For me, being new technology has never been a reason not to put something in the med-kit. SPOT used this way is not even a new concept.  It is just more effective then a whistle or a signalling mirror.  Same purpose, just greater range.