Maybe I'll start using mine more often with the psu rather than off the battery - though that would be a reversal of recent trends.
It's worrying that this could happen randomly, and if I travel I do take mine on aircraft. Couldn't do without it sometimes. What would happen if one exploded in an overhead locker? If airlines stopped these (as they did with one of the Galaxy phones), then I'd have to go by train to some locations, and perhaps even the railways would stop taking them.
Presumably statistically the chances of major problems are very low, but it does seem that although the probability of issues seems very low, that the consequences are rather severe.
I think I read somewhere that Toyota haven't so far been permitted to sell their hybrid or plug in cars in the UK with their most advanced batteries, as not considered safe enough yet. The older Prius models used Ni-Mh batteries, which energy wise aren't as good as some of the lithium based ones. Unfortunately I can't find the link where I read that. I think it was about the different cars allowed in different countries - perhaps including the remaining (in all senses of the word!) EU ones.