This would have to be one of the coolest science projects I've ever seen. These guys sent a HD camera and an iPhone for GPS tracking into space (100,000 feet). Something I would never contemplate - not only risking losing the HD camera and iPhone, but I'd be concerned releasing a weather balloon potentially into occupied airspace, or having it come down on someone.
Oh well, I guess that is why they did it and I didn't.
So whether or not it is irresponsible or foolhardy, I don't care. I reckon it is awesome.