Nothing
Currently it’s being devanced by articles that are olders, with less upvote and fewer comments. Can you guarantee that nobody is able manipulate ranking? It’s only a hunch, but it’s not the first time that I notice that google related "bad buzz" move away from main page slightly faster than other...
PS: I’ll gladly accept downvotes. But answers on why I’m wrong or paranoid would have been better
Also: lots of HN'ers work at google. It would be a nice rule if people were told to abstain from using their flagging privileges when the company they work at is the subject of a thread.