The fuel system in the modern cars with the plastic lines in the engine compartment is much more vulnerable and has hundreds of times the incendiary power than any A/C system. So are backyard barbecue grills. Check the stats on injuries from those 2 compared to any caused by flammable refrigerants. I'll bet Keith is right on the DuPont funding, would be interesting to uncover the truth about that.

Remember, if the safety nazis had their way, we would not be able to have our GMCs on the roads at all.