Those keeping devices are fools at best
From what I've read and seen it is a case of "when", not "if" a Note 7 will combust. The space left around the battery for thermal expansion (correct term to use here?) is so tiny that eventually the battery will fail. Some have gone sooner than others, some may take a day whereas others may last a day or less.
There is a huge and very real risk and anyone that wants to keep their phone is being very foolish. I realise all phones are potentially explosive if the battery is pierced or damaged significantly but that is not the same as risk as merely using or charging. If I was Samsung I would push the update onto all devices with no user opt-out. There are consumer rights and there are safety concerns. I would hope that any drama lovers bringing consumer rights into it would be ignored in favour of the safety concerns.