I agree TooterTurtle, about giving the pump and dumb validity by responding. Its like if someone calls you a liar and you know that you're not, just go on your merry way, the truth eventually wins out. A serious company would just shrug it off unless perhaps they would like the stock price to drop to buyback shares.
Responding by saying nothing and reenforcing to shareholders what has been accomplished may work. And as you said Toot, it may work. I also hope someone with cash lays the wood to this short