My table (relatively new players) has a balance of players that understand the concept and application of role play, and one that intuitively gets that if his character would do something reckless (or if the reckless can be directed to push the story forward) the reckless is going to happen.

I find this creates a good balance, but I’m keen to hear how you have all experienced this. Never had the accents or role play jump to this degree however.

Similarly inexperienced opinion here, but I’d also allow it. Agree with the others that pouring the oil would be potentially visible, but definitely after the fire is lit the smoke would make the players visible when they move. Kind of like how the smoke allows you to see the tripwire lasers.

Rule of cool first and creative thinking is what makes ttrpgs great. However, you’re the DM and the tone of the game is ultimately up to you.

Sounds like your players are thinking outside the box, which in my experience is nothing but a recipe for fun (and likely headaches for your carefully laid plans). Good luck.

Simpsons hit and run?