The Great Breen Boondoggle was an incident circa 1963 in which fan Walter Breen (soon after, the husband of very well-known fantasy writer Marion Zimmer Bradley/MZB) was banned from Pacificon II/Worldcon as he was judged to pose a threat to children. The action was led by Bill Donaho, the chairman of Worldcon, and The Great Breen Boondoggle is the title of the zine that Donaho wrote about the action. The exclusion was highly controversial and Donaho reportedly regretted it. Fancylopedia 3 writes (at 15 June 2014): The text of The Great Breen Boondoggle is available at the Breendoggle Wiki.