There's an old probably apocryphal tale about Lyndon Johnson that was popularized by Hunter S. Thompson which goes like this:
This is one of the oldest and most effective tricks in politics. Every hack in the business has used it in times of trouble, and it has even been elevated to the level of political mythology in a story about one of Lyndon Johnson’s early campaigns in Texas. The race was close and Johnson was getting worried. Finally he told his campaign manager to start a massive rumor campaign about his opponent’s life-long habit of enjoying carnal knowledge of his own barnyard sows. “Christ, we can’t get a way with calling him a pig-fucker,” the campaign manager protested. “Nobody’s going to believe a thing like that.” “I know,” Johnson replied. “But let’s make the sonofabitch deny it.”
Tumblr keeps making me think of this anecdote. There's a group of users on here who constantly demand if anyone mentions BDSM positively or even neutrally they caveat it by saying they aren't talking about abuse or if a man likes to call his boyfriend daddy they demand he disclaim that he doesn't support incest or if a trans girl likes to wear cat ears she needs to deny that she isn't into bestiality.
The point of this isn't that they actually believe it themselves or even a lot of the time it isn't about convincing other people that it's true but just to tar people by creating the association between two unrelated things by demanding that people constantly deny it.
