As a parallel to treason, "which never prospers, for if it prosper, 'tis not called treason"- conspiracies don't happen either, and can be rationally explained as "mutual interests, "birds of a feather" or "just business," economic or political: but if too bizarre to easily pass muster they are buried under the "top secret", "national security" file, with just enough coverage of facts to satisfy most people. The rest are relegated to the "paranoid" demographic, nut cases, who should spend more time watching Netflix.