Being someone with first hand experience, and the technical knowledge to present challenges to TPTB's arguments when applicable, I can tell you its just too damn painful to do so.
No developer worth any salt is going to engage with him because it simply devolves into name calling if you don't align with his thoughts. Before long the n00b, b-lister, you are not worthy comments start regardless of if he's right or not and its just a noisy waste of time. I've seen the same towards people just trying to understand and not necessarily even disagreeing.
The discussion ends in a blaze of fire with one of the parties leaving, usually it's not TPTB that has departed (he can argue all damn day) so it "looks" from the outside that he won, even if in reality his "facts" are wrong.
Aaaand it begins.
TPTB: Something to consider:
http://www.principiadiscordia.com/forum/index.php?topic=32044.0Smartest Guy in the Room syndrome is related to Dunning/Kruger Effect, and affects men and women equally.
The Smartest Guy in the Room is smart enough to know that he's smarter than most people, but not smart enough to recognize when other people are smarter. He defaults to the belief that because he is smarter than the majority of the population, he must be smarter than the people he's talking to, and tends to look no further or deeper than whatever initial assumption he has made or conclusion he has come to.
The Smartest Guy in the Room is recognizable for his tendency to dismiss other people's views without critically examining why, for glancing at a discussion, assuming other people are being foolish, and correcting them based on that assumption without actually checking the source material himself to understand what they are discussing, and for either digging in his heels and screeching, or for "refusing to argue because it's pointless" whenever anyone else presents difficult-to-refute information that contradicts his conclusion.
He actually can't learn, because he thinks he already knows, and that the rest of us simply aren't smart enough to see his enlightenment. The Smartest Guy in the Room has usually been through at least one, sometimes two jailbreaks, but then something critical happened; he stopped. Convinced that he had broken out of his cell, he latched onto whatever form of enlightenment helped him get there, failing to realize that enlightenment is a verb, not a noun. Clinging to the implements of his enlightenment, he also failed to notice that he is once again squatting in a cell almost identical to the one he believed he had left behind.
There is nothing that can be done with a Smartest Guy in the Room, as any attempt to convince him that he is missing out on a huge aspect of bipedal development will simply lead to him thinking that you don't understand his unique and highly sophisticated perspective. In that sense, the Smartest Guy in the Room is stuck in a state of arrested development, at approximately age fourteen.
He is a lost cause and cannot be rehabilitated.