I think one thing people are also forgetting is NiMh can swell and explode as well, infact much easier just by have the battery shift and short on your chassis. I have actually seen a guy pull of the track with a smoking car and as he went to pick it up the car exploded, even ripping part of the body shell and he was running NiMh. With these batteries it looks like the only abuse you can give them is in the charging stage since they claim there is no need to discharge or cycle. All batteries are dangerous just in different ways as long as you are careful anything can be used safely.
Next year I am going nuclear LOL!