I think I have to agree with ADCMS: the millions campaign leading up to 1925, with Rutherford confidently expecting the return of the 'ancient worthies' - the liquor-loving lunatic thought that Daniel, Moses et al would be comfortable, post-resurrection, in a Californian mansion. That was a belter, wasn't it!
Also some WTS views on dinosaurs and extant species are hilarious and seemingly hard to parody, although I expect Jehovah's Trumpet website has had/will have a bash at it.