I was just kidding. Actually, I have a lot of fun with Sitchin's books. A real enigma. He's nothing less than an expert on the early civilizations of Sumeria, Babylon, etc; especially adept at reading the scrolls and understanding the language of those civilizations and then totally blows all credibility with his 12th planet nonsense. I suppose it's because playing to the Von Danikin crowd sells a heck of a lot more books than playing straight. If you care to read just one of his books that has a lot of interesting intellectual insights on the origins of civilization similar to the stuff you post here, I'd recommend "When Time Began" but fair warning, you still have to gloss over the 12th planet spacemen stuff to get to the good parts.
"I suppose it's because playing to the Von Danikin crowd sells a heck of a lot more books than playing straight."
Definitely. And predicting a planet will take a spin through the inner solar system, reaching perihelion more than 1000 years from now, after Sitchin and the rest of us are dead and forgotten, looks like genius marketing. :')