An example of this happening is on Wikipedia where one editor in particular seems to have declared it to be a “conspiracy theory” and scrubs every mention of it. The editor in question scrubs talk pages and their own talk page, thus effectively preventing any kind of consensus forming, which is out of the ordinary for Wikipedia. They have remarkable stamina, and thus can our out-wait other editors.
Wikipedia seems to be one example of a much bigger effort to suppress discussion of a potential lab leak.