If some conspiracy theory is popular, it should absolutely show up in search and autocompletion. Google isn't the arbiter of truth and shouldn't be reducing visibility of anything on the basis of its "conspiracy theory" status. There are many theories that were ultimately proven true.
You "suicide" everyone with the credibility and potential motivation to expose you, and you use your board-level blackmail influence at numerous publicly traded compaines to establish narratives that associate your political opponents with your own crimes, I think.
Should they suppress queries about area51, Scientology, The_Donald, The_Müller, r/politics, Trump is a Russian stooge, etc?