Unless i know this happens to someone i know or in my country i'm not too worried/bothered by the odd freak occurance thousands of miles away from me. If many of these ipad air's/old ipads/whatever one it is blew up then i might start to think its a major issue
Its a bit like when a radio show/tv show has to offer an apology on tv as 7 people complained about something. How about the other 13.7 million who didnt mind the joke ? Why do we have to always listen to a tiny minority at times.
I'm sure there might be the odd issue now and then just like i'm sure there was the odd issue with Pentium chips on early PC's back in the early 90's. Just nothing to worry about
I learnt my lesson not to buy non-Apple chargers, that was my own fault