Page 114 of the 2006 NRC report:

"The prevalence of severe enamel fluorosis is close to zero in communities at all water fluoride concentrations below 2 mg/L."

The absurdity of your argument of "physiological and psychological damage" from mild dental fluorosis is clearly evident when one considers the  very real "physiological and psychological damage" from untreated dental decay which can be, and is, prevented by water fluoridation.  This decay causes lifetimes of extreme pain, black discoloration and loss of teeth, development of serious medical conditions, and life-threatening infection.  No children have ever died as a result of mild dental fluorosis.  They have from untreated dental decay.

Kind of puts your "concern" for benign, barely detectable mild dental fluorosis into proper petspective doesn't it?

Steven D. Slott, DDS