Seems like a better response would be to prove your submarine is awesome than claim the detractor is a pedo. But I'm not the smartest man in the world.
It'll be interesting to see if Elon Musk, darling of startup entreprewannabes, gets a pass here.
I hope his followers understand the precedent this sets. Are they truly about engineering solutions to tough problems (as they claim they are), or are they just a cult of personality cultivated to protect a thin-skinned master?