The phenomenon of refusing to click the "Thanks" button in order to send out the signal that one does not like the poster is unfortunately not limited to La Casa Del Sombrero™. People are people, and we see that over here as well. But yes, even back when I myself was still a member at Casa Ryan™, it already was one of the most prominent signals from the favored castes that they didn't consider you one of them.
Ah yes, that's a very beautiful and apt description for what has been my experience there as well. And that was over three years ago already now. As the French would say...