Depending on where you live, there is already enough naturally occurring fluoride in the well water that adding more doesn't mean much. How else do you think they discovered fluoride helps your teeth?

Since I live in a rural area and need to have my own well, I know my water contains enough fluoride that it would be silly to add more. But some areas do not have enough naturally present. So it would be interesting to see the water test results for Florida cities to check the amount of naturally occurring fluoride present. YMMV

My thing is this...

1. Adding it requires effort
2. Removing it, if possible, requires effort
3. It's not a requirement
4. There are other alternative methods to get it, like toothpaste, or sumpliments, that don't force your neighbors to have your fluoride.