Whilst, of course, not acceptable, these sporadic "exploding e-cig" events are pretty much part and parcel being human. With X amount of idiots on the planet, and the increase in the number of people using e-cigs, then by default, the amount of idiot vapers will increase, along with the amount of "idiot induced" accidents, proportionally, as vaping popularity increases.
Vaping, like all other leisure activities, also suffers from "the sunday market effect" with down market,poor quality, cheap and shoddy, devices available to hoodwink the hoodwinkable.
The press has an opportunity to expand on the details of these "accidents" ie, mode of use during the accident, type of device, name of device, recommended usage, actual useage, legitimate device, dodgy device etc etc. which could help towards e-cig safety. But they won't, because real facts and circumstances detract from the required shock value of the articles.
The Press will never change, they thrive on their "Toaster electrocutes Child" articles that forget to add "child pokes fork into toaster"