So I quit pinging him.
When I am busy I rarely ever read replies to my posts. I would wager that over the years I have read way less than a third of the reponses to what I write. I suspect the same is true of billybob.
I know he has been working on a rather involved brief to be filed before the Surpreme Court. That is what he does for a living. I suspect the amount of work involved in the research is very demanding. I wonder if some of the things BillyBob posts are just to see if the responses contain anything he has overlooked in the brief he is preparing. Perhaps he uses some posts to find overlooked angles that might need to addressed.
But I doubt if he would ignore a post because he disagrees with you. More than likely he did not read it, or you were trying to take him down a path he had been down many times before and did not have time to go down it again.