While it is important to charge and handle LiPos correctly, I think some of these above ideas are clearly over reactions. For example: Placing more than one of any battery in a single container creates a larger fire potential versus the potential offered by one shorted pack. You store them together, if one goes they all go. Or, ... Ammo boxes seem reasonable. But they are also metal. Metal conducts electricity. Could one of the cells short? Could one of the wires short into another battery? Also, riding down the road with batteries shaking around in a metal can seems like it could wear thru the batteries' soft container. One has think about the unintended consequences of what we are doing.

While LiFes typically offer higher than LiPo current ratings, LiFes do not offer the higher voltages. Voltage is what most of our electric planes' and Heli's performance thrive on. By the time you increase the cell count get the necessary voltage out of an LiFe, the weight and size has gone up considerably over the LiPo.

I have had two LiPo fires. Both were caused by me shorting the high-power leads when changing the connectors. (Don't ask, Why two? Field expedience sometimes causes a short memory?) Sand works best to limit the fire, but it still burns to chemical exhaustion. Also, the fire will pop up your concrete. Don't ask how I know. The resulting fire is just like the magnesium fire we used to do in chemistry class, only larger! But, ... they fizzle before they burst into flames. Drop it in a metal container and set it outside to to burn off. Then, ventilate the area well.

I also have crashed a couple planes with LiPos to the point of significantly deforming them. Never had a problem with them. I just poked a hole in the cell cases with a wood stick and tossed them into a bucket with saltwater. Couple days and they were inert.

I even once took a puffed LiPo and poked a hole in each cell and squished out the gas. Put aluminum tape over the holes and used it for several more flights, before I got replacements. No problem! It was just an experiment to keep flying with a battery that grew bigger than the battery box. I am certain that it would not have lasted. But, my temporary fix worked.

If handled and charged correctly, I feel they are reasonably safe. If they were not, I would not be letting the 24 kids in our after-school program handle them (after we show them how to handle them safely.) However, every thing we do involves some degree of risk. IMHO some of the above proposed actions unnecessarily increase the involved risks.