$cientology - the "Religion of Intolerance", and their militaristic "Enemy Files" are well known:
http://home.sol.no/~spirous/CoS/archive/time910605.html The IRS and FBI have been debriefing Scientology defectors for the past three years, in part to gain evidence for a major racketeering case that appears to have stalled last summer.
Federal agents complain that the Justice Department is unwilling to spend the money needed to endure a drawn-out war with Scientology or to fend off the cult's notorious jihads against individual agents.
[NOTE: What was it, again, that Miscaviage told the IRS official when he dropped by unannounced for a "private visit" that resulted in an immediate acceptance of Co$ 501c?] "In my opinion the church has one of the most effective intelligence operations in the U.S., rivaling even that of the FBI," says Ted Gunderson, a former head of the FBI's Los Angeles office.