I think you misunderstood?
I meant “fake bug reports” in a sense that they are caused by a faulty mod / combination of mods people shouldn’t be using / outdated mod… etc… basically an error on the users end for using something that breaks their game and then they think that the issue is with the game itself, when it’s the mod.
As for how I know… I spent the last year working with the game’s source code several hours a day getting information for people, making mods myself and helping people track down actual game issues.