The difference with GPS is that these balloons (I assume) allow two-way communication, so if you are in trouble you can call for help and there's a good chance someone will actually be able to respond AND know your exact location.
That's when the fun begins.
But if you feel the need to attack someone you'll most likely never see or meet as being "smug" for tangentially pointing out this fact (ironically backed by exultations of your own vastly superior experience in both technology remote environments) -- instead of minding whatever work someone is presumably paying you to be doing at this time, as we speak -- well, do what you need to do, I guess.
Rescuers had no trouble locating these idiots: http://www.nationalparkstraveler.com/2009/10/third-time-was-...
This is a very real, big and growing problem for wilderness rescue services: http://www.nytimes.com/2010/08/22/science/earth/22parks.html