Just watch this - Georgia governor Sonny Perdue praying for rain on the steps of the capitol in Atlanta, trying to end the drought.
Yeah, that's going to work.
Last time I checked - still no rain in Georgia.
Rewind back a few thousand years ago, and the Maya and Native Americans were pretty much doing similar kinds of rain dances, but they seemed to think sacrifices helped too. Look how far we've come.
Sacrifices are silly.