This man ought to be able to have a ferris wheel on his lawn if he wants. HOA or not, he's a Medal of Honor winner and deserves to fly his flag in any fashion he wishes.
Great publicity for the law firm, I wonder if they even looked into the guy before sending the letter. I say keep it and if they sue, there will be hell to pay. Rest assured, this man will never have to pay a cent, the grateful among us will do it for him.