Hard to take your post seriously when you write "stories" as "story's", but let me take a stab ...
"we even know someone in our village who's iPad charger burnt their house down"
Unanswered questions:
- Was it an official Apple charger, or a cheap third-party charger?
- Was the charger covered in any way, preventing heat from escaping?
- Was the device covered in any way, or on an insulating surface (bed or pillow) that caused it to heat up more than normal?
- Was the charging cable twisted excessively and/or beginning to fray?
- Is the electricity in your "village" well-regulated or is it prone to spikes in voltage?
Electronic devices come with "Usage Guidelines", and any usage that deviates from that may be a recipe for disaster. It comes down to common sense and responsible usage.
It's not as simple as blaming the device without looking at the full circumstances. However, in the case of this Samsung device... powered down and placed into a pocket, yet it starts to combust? That's scary and dangerous!