Intentionally creating and spreading a fake or blatantly flawed statement in support of a dissenting view and, once it gained wide popularity, debunk it in order to destroy the whole subject's credibility.
Self-faking is a form of strawmanning in which the opponent's claims are not simply made up, but directly planted into their mouths, making it practically impossible to expose.
This technique works in three phases.
First, a claim is intentionally designed in order to go directly against officially accepted version about a particular issue, while at the same time being either blatantly fallacious, or contrary to easily available evidence.
Second, that claim is launched through non-official channels (some anonymous source, "alternative" news sites, blogs or social media accounts, etc.) and allowed to go viral as much as possible without intervening, or even actively contributing to its spread.
Third, once the claim has now become widespread, mainstream official channels and talking heads are finally allowed enter the scene and debunk it with no chance for survival.
In this way, by association, any form of disagreement around the initial issue is brought down together with the false claim, making it way more difficult for alternative researchers to have their opinions considered.
The first phase serves to depict dissenters as the most stupid or guillable people as possible, by attaching the most easily debunked claims as possible to them, while the second one serves to make sure this blackwashing reaches the highest possible number of people and is therefore ingrained as much as possible into the popular imaginary.