There's controversy about it for some, but most people, I guess, are fine with it. My grandmother-in-law was talking to me about it a few weeks back. When I looked into it there didn't seem much reason to have it around. Her and her husband use well water at their home, and I don't think she liked it much when I said that fluoride was naturally occurring and that their water probably has four times the fluoride levels as the city water does.
Then again, the people who think that there's "controversy" over it are probably the same ones that have been inundated with crap like "All your health problems are from a backed-up colon," or "These LED lights can reduce your pain," or "Use this magnetic bracelet to get rid of your arthritis."