Flouride has many uses, which can be good or bad. It is the most chemically reactive of all of the elements. I'm not sure, but I suppose it could be used as a poisonous gas, but chlorine seems more deadly. As for the rat poison, arsenic is the main active ingredient. IF flouride was in our water, it would react with the hydrogen in H2O to form HF, a weak acid, which would not have much of an effect on us. Flouride is not in toothpaste, but a compound containing flouride, NaF, or sodium flouride. I don't know what conspiracy theory you are trying to prove, but whatever it is, you are not convincing.