What you don't know can't hurt you.
"I've been drinking this water all my life and it hasn't hurt me."
I can only paraphrase my mother, as I didn't record her exact words. Whenever I visit her in Savannah, Georgia, I always find the tap water to be distasteful, and after a couple of days of drinking it, my kidneys ache. Invariably I end up buying distilled water to drink while I'm there. My mother thinks I'm a bit strange, lacking faith in a wide assortment of areas, including our human leadership and the man-made systems that currently sustain us.
A new book published in September 2010 continues the long-running and very real scientific trend of condemning fluoridation of public drinking water as dangerous and harmful. "The Case Against Fluoride" by Connett, Beck, and Micklem makes it clear that the science against fluoridation is solid, as solid as the economic interests that drive water fluoridation at the expense of public health. It seems sick people are profitable, and wherever handsome profits can be made by selling industrial waste products to a naive public, sociopathic businessmen will vigorously pursue it. I have strong faith that sociopaths will do this (based not on blind belief, but on extensive evidence).
The chapter in the book on the endocrine system finds that fluoride causes hypothyroidism and goiter, by a variety of biochemical mechanisms. It also notes that the second most widely prescribed drug in heavily fluoridated America is levothyroxine, also known as Synthroid. Problems with goiter and thyroid function are common among residents of Savannah. My mother takes Synthroid.