Unfortunately, I don't think it will backfire. Conspiracy theorists like to talk about heavy metals in the atmosphere being used to brainwash us, however, this past year has shown us it's way simpler than that.
If you just repeat the same thing over and over from different sources, people come to accept it as true. Whether they believe it or not doesn't matter, behavior is still dictated by what we're told, and no one wants to be the nail sticking out.