Yeah, NAMBLA exists primitive - here is an article from your beloved WaPo reporting that your beloved ACLU defended them in court back in 2000
http://www.washingtonpost.com/wp-srv/aponline/20000831/aponline171914_000.htm
-It t'aint PSYOPS. NABLA is real - and you DUmmies need to 
Not only did the ACLU defend NAMBLA, they did it pro bono.
"Men have sex with underage boys but those men wouldn't join a boy banging club because if its headquarters ever got raided, which you know it would be, every name on the rolls would be sent to law enforcement. You know the act of belonging to a boy banging club would be sufficient to convict on pedophilia charges..."if you aren't having sex with minors, Mr. Smith, why are you a NAMBLA member?""
1. Some of them might not have ever actually had sex with a minor (Likely out of fear of being arrested), but wish to be able to do so.
2. I may be mistaken on this, but I think that in order for a person to be charged with child molestation (Or any sexual assault, for that matter), there would need to be an actual victim of sexual assault that the defendant could be linked to. Simply being a part of a club isn't enough to prove that an adult has had sex with a minor. The most that might do towards a conviction is maybe act as further corroborating evidence if there was already something of a case against him. In fact, if the prosecutors used simply his membership in a cub as proof that he did it with no other evidence, it might even enable NAMBLA to file some sort of slander/ defamation of character lawsuit. Let's put it another way: Suppose that a person who was a member of NORML (The lobbying organization that pushes to fully legalize marijuana) was arrested on charges of drug use or possibly even dealing. Suppose that a search of the person's house didn't yield a single bit of evidence. Do you think a case in court could be made against him by simply saying, "If you aren't using drugs, Mr. Smith, why are you a member of NORML?"?