Good point.
By pure coincidence, I had a small oil-spill a day or so ago. Refinishing a wooden plane with linseed oil, I stupidly knocked the can over, causing a slick which slithered it's way to the bench edge and onto the floor. Mopping up with kitchen towels didn't take long (lovely finish on benchtop now!), but disposing of about ten sodden sheets of kitchen towel was a bit of a poser - I usually spread them out to dry, then throw them in the bin; but these were too sodden for that. In the end I took them outside onto the edge of the lawn and put a match to them (not going to set fire to the garden this summer!), where they burned steadily for a surprisingly long time, giving off quite a bit of heat.
If they had been allowed to combust in the workshop, they'd have had easily enough fuel in them to get a benchtop alight, and that was just from a couple of fluid ounces spilled.