no, this is not fake.
PETA President, Ingrid Newkirk, reportedly sent the following letter to Sharon Stone:
"Given that millions of people... were killed, injured, and left homeless by the recent earthquake in China, everyone was shocked to hear you dismiss the devastating effects of this disaster. However, your cavalier attitude did not come as a surprise to us. We are used to the indifference that you flaunt and the callous remarks that you make about the suffering and death of the animals whose fur you wear so often. Scientific studies suggest that the prefrontal regions of the brains of people who lack empathy might be underdeveloped. Here's our offer: Would you allow PETA to pay for a scan of the prefrontal region of your brain to determine if comments and actions that seem to demonstrate a lack of empathy are the result of a physical defect?"
I can't decide who the bigger idiot is. Perhaps it's Stone, if only because to receive a letter calling you stupid from PETA - an organization run by idiots - then it means one HAS to be pretty low on the intellectual food chain.