Don’t forget the underlying heavy lifting that has to be done for a governmental conspiracy; my favorites are like the “Roswell UFO” folks. That happened in what, 1947, 48? Thousands of military and intelligence types would have to be brought in on the secret to make use of the information, all those would have to be watched to make sure they don’t spill the beans, and the watchers have to be watched, etc., etc. Thousands of people and the only ones that “break security” and spill the beans are obvious loons. The simple truth of the matter is that conspiracies RARELY are kept secret. Too many people know, and people want to talk about cool secret things.