Emily, what I wrote was "If people are using fluoride toothpaste they're already getting more than medically recommended." What you wrote in response was ""If you seriously believe that using fluoride toothpaste is not medically recommended then I hope you are in no position to advise or care for children...." 
How does your statement logically follow from mine? Why insult me? I was theoretically conceding that fluoride might have some useful purpose in topically treating children's teeth, as a peace gesture, and you turned that into an attack on me, saying that I should not be allowed to advise or care for children. What part of playing fair did those who advised or cared for you neglect? 
You now compare fluoridation with chlorination. Chlorine is necessary to kill waterborne disease. Fluoride is not. Chlorine evaporates from tap water if allowed to stand overnight. Fluoride does not. You have told me I'm "mistaken," but several writers here have refuted your claims. Focus on those.