Actually, I stand corrected. I went back and did a bit of studying about the history of NAMBLA, and actually it did grow out of the LGBT community in 1978 as a direct result of then-Boston District Attorney Garret Byrne to ferret out patrons of teenage male prostitutes via an anonymous telephone tip line. You see, NAMBLA actually has nothing to do with the original 9-year-old red herring that was presented.
The aim of NAMBLA's small but determined membership was to attack social and legal proscriptions against sexual relations between adults and pubescent or teenage boys. Trust me when I say that no one would ever confuse a 9-year-old with a "teenage, or pubescent boy". Early on, there was support for the group by the LGDBT com munity. After all, differential age of consent laws for homosexuals and heterosexuals were then (and continue to be) used to target gay sex in jurisdictions around the world, including ones in the United States. This was also, at the same time as Anita Bryant's "Save Our Children" campaign less than a year old. Bryant had successfully advocated rescinding a Miami city ordinance extending equal protection to gay men and lesbians on the grounds that gay men were uniformly pedophilic. So, you know, it's kinda understandable that this effort grew out of the gay community. However, with the assassination of Harvey Milk, and the election of Reagan in `80, and the advent of AIDS, the climate became so hostile towards gays, and lesbians, that the whole NAMBLA association kinda got left out in the cold.