Firstly, the actions in the examples you provided were exposed not because someone repeatedly made baseless accusations. The exposure of such actions occurs under the pressure of concrete facts and evidence, not gossip and rumors.
Secondly, this is one of reasons why I do not call for completely removing conspiracy content. Let conspiracy theorists publish as much as they want, but they should not be able to make money and gain popularity from it. They should not be able to find new followers by having their posts appear as "recommended" to others. This has already gone too far.
And regarding terminology - it is important to understand that the term 'conspiracy theory', although established, is not entirely accurate. A theory is a proven hypothesis. However, much of what is called conspiracy theories has not been proven and some have even been refuted. And yet, they are still called conspiracy theories, and we clearly understand that this usually refers to something unproven.