Well, I like the part about carrying all the various and sundry paraphernalia into the airplane restroom and mixing the ingredients one drop at a time "discreetly" over a period of up to 30 min. without alarming the other passengers, arousing the suspicion of the crew or being overcome by the sulfur fumes.   LOL


I understand that you could, actually, fill a wine bottle with gasoline, cork and seal it the way any good winemaker would his best vintage, then walk from thru the cabin on the plane sprinkling its contents and set the whole place ablaze with a match.
Of course if you ban matches on planes, they are a lot easier and cheaper to replace than most liquids are (including bottled water).

But if you're worrying about people mixing liquid bombs while on the plane, here's a concept:
LOCK THE DAMN OVERHEAD BINS WHILE THE PLANE IS IN FLIGHT