"...Make a fire with something oily and stubborn - soak some rags in used motor oil and hang some old curtains over it to simulate a kitchen grease fire...."

Good idea. But it might also be a good idea to let the local fireguys, and your neighbors, know before you light off that smokey fire. Or you end up with a firetruck in your driveway, with all those pretty lights flasing, siren winding down. Also a back-up person with another extinguisher, just in case you mess up...