I respect this position.

My choice has been to run rechargeables for most uses -- with a big exception being flashlights in kits, where they're subject to long-term storage and often in less than ideal temperature conditions.

LiOn rechargeables, for me, are always used in a single-cell configuration (no devices with multiple cells) and are only recharged under supervision in a quality charger. The idea behind supervision is to put the fire out quickly if one should start.

That's what works for me; "primary cells only" is an excellent choice that is very safe as long as new and used cells aren't mixed.