So I've been reading for my entire life about these nut-jobs who thought flouride in the water was a government plot, that it didn't do any good, and that we didn't need it, if it wasn't actually bad for you.
Looks like they were right. Read all of Dr. Briffa's post. It's the longest post I've seen him do.
Just remember this: if you have a question about the science behind some dietary issue, you might not live long enough to get the answer.