Well, a good many Li-ion batteries intended (or at least marketed) for flashlight use don't have charging control, only safety protection to prevent really bad outcomes (i.e., they'll let you kill your battery way before its time with a serious overcharge, but will disconnect for safety before you overcharge to the point of explosion/fire), and some come with no protection at all -- because protection circuits aren't available that small (e.g. 10440 cells), or just because they're cheaper that way! I actually use 10440s for one of my flashlights, and obviously don't leave them on the charger unattended or after they're charged, as that's a 1POF bomb.

It's never been settled whether the N8x0 batteries have even this level of protection, but I'm fairly certain they do. I'm highly doubtful that they contain any charging control, as that's usually found only in multi-cell packs, where maintaining balance is crucial to getting full battery life without safety risks. But as long as you've got safety covered, there's nothing to be gained in adding charging to a 1 cell battery when you can implement charging in device firmware. Like you said, it's at least 2POF, so I don't worry about it.