A lot of very respectable and knowledgeable people disagree with the fluoride "conspiracy." Like many other things, how it's used is what determines whether it's beneficial or detrimental to your health.
Dr. Ellie Phillips is a prevention-minded dentist who believes in evidence-based dentistry. There is nothing "dangerous" about her. She has made it her mission to help people, not harm them. Read her book Kiss Your Dentist Good-bye and you'll see what I mean.