Player-held torches can set drifters and other flammable entities ablaze

[LadyWYT]

It really ought to be a thing. Is it practical? Not particularly. In fact it's downright dangerous! But it's rather disappointing that I can't set drifters on fire with a torch; I got slapped in the face so many times while making the attempt.

As far as other entities, I'm not really sure why you would try to set them on fire either, outside of being a pyromaniac. The drops from the carcass would almost certainly be worse than if you had hunted via conventional means. On the other hand, I'd think managing to set a wolf/bear on fire would at least scare it away and give you a chance to escape.

[Thorfinn]

Used to be able to smack them until they started on fire. It's just that fire doesn't do as much damage to them as you might like.

[Maelstrom]

You can accidently set your wood house on fire.  And wildfires are a thing.  Drifters can also burn, although the only time I've managed it personally is from them wandering through my field of lit pit kilns coz I haven't bothered to confront a drifter with a torch.