Steve Selnick has a severe allergy to peanuts. He's chronicling his experiences eating out on Peanut Free: Boston:
Knowing that my meal officially wasn't happening (cross contamination is one of the scariest things to me) the manager put the icing on the cake. He said that if I had an allergy so bad that I would have anaphylaxis (which I would) that I shouldn't be eating out ... at all.
So with this friendly display of allergy ignorance, I can't advise anyone with a peanut allergy to come anywhere close to P.F. Chang's.