The JFK conspiracy theroy is just not allowed.

[HooptieWagon]

53. The problem with conspiracy theories is they collapse under their own weight.

You've got the original assassination conspiracy. Then there's all the coverup conspiracies...faked photos, forged Zapruder film, faked autopsy, etc. Then theres all the "silencing" conspiracies to eliminate witnesses. Every inconvienient fact is relabeled to be part of the conspiracy, until there's hundreds of people involved. Now, what is the probability of hundreds of people not only doing their assigned role successfully, and also keeping silent about it? Zero. Murphy's Law tells us that somewhere an operation will run into a snag, and fail. Someone will get liquored up and blab, or offer up information in a plea-deal for an unrelated crime.
Secondly, there is the matter of Oswald himself. The guy was not only unstable, but unreliable. He was a failure at everything he did prior to 11/22. If a group was conspiring to commit such an epic crime as assassinating the President, would they assign the most crucial role, the assassin himself, to a loser like Oswald? Any of the common groups mentioned by CTs....Mafia, CIA, RWers, Cubans, etc ... have professional hitmen. So why would the job be given to a 24 year old unstable and unreliable loser?