An illegal act which more than one person cooperates to commit is a conspiracy. Almost all crimes prosecuted by the FBI are conspiracies. Indeed, Conspiracy is the most common charge pressed against perps by the FBI. That makes the FBI perhaps the largest group of professional conspiracy theorists that has ever existed. I point this out for folks that may feel learning about possible conspiracies is somehow unamerican, or silly. What is really alarming, rather than just feeling a bit silly, or confused by deceivers, is that very recently the FBI has declared conspiracy theorists potential domestic terrorists. One of the most alarming parts of the statement they released was that folks that learn about real conspiracies committed by criminals in government can lead to domestic terrorism charges.