1973 APA conference. Bunch of homos screamed and shouted down and basically terrorized the psychiatric conference gathering.
Homosexual Activists Intimidate American Psychiatric Association into Removing Homosexuality from List of Disorders.
http://conservativecolloquium.wordpress.com/2007/10/01/homosexual-activists-intimidate-american-psychiatric-association-into-removing-homosexuality-from-list-of-disorders/