> The thing is, this is something no one is really incentivized to lie about
I don't think it's lying in the sense of trying to make someone else actually believe it. It's just a form of creative fiction writing. It can be a lot of fun to write in this mode; when well done it's a pleasant kind of erudite humor because to produce it (and get it) you have to be somewhat knowledgeable in the topic. Mockumentaries might be the film/TV equivalent. Unfortunately (especially for certain subjects) it also confuses and causes strife if readers take it too seriously.
The British Flat Earth Society is a joke society in this vein. They amuse themselves by writing very erudite debunkings of the nefarious Spherical Earth conspiracy theory, and sending strongly worded Cease & Desist notices to NASA.
I don't think it's lying in the sense of trying to make someone else actually believe it. It's just a form of creative fiction writing. It can be a lot of fun to write in this mode; when well done it's a pleasant kind of erudite humor because to produce it (and get it) you have to be somewhat knowledgeable in the topic. Mockumentaries might be the film/TV equivalent. Unfortunately (especially for certain subjects) it also confuses and causes strife if readers take it too seriously.