A shared delusion, typically by followers of a leader who has deluded ideas they fully accepted as their own.
The podcast had no listeners and was a rambling boring mess with occasional vulgarities, but the shallusion continued because they didn't want to believe they had to work on their careers.
Anyone using reason, logic, facts, peer reviewed papers etc. to refute a point made by any of the many pseudosciences or conspiracy theories which results in said person being accused of being a paid shill.
Fan 1: What's the best ship in voltron guys?
Fan 2: *breaths deeply* UH DUH KLANCE
Fan 3: UH noo Sheith is soooo gonna be canon and you know it!
Fan 4: Uh you're all wrong, it's all about shallura.