Nope, if they open it up and find smoke residue inside, they consider it hazardous material, and will not work on it.
No, they don't. You must have been reading the thread someone posted before. If your machine is caked in smoke residue, then yes, it is a hazard and you will have to get it cleaned (even in that fringe case, they did not deny coverage, but simply told him to get it cleaned before they would work on it). Try actually including facts instead of ridiculous assertions based on wild whims in your posts. Apple's policies are well documented.
jW