Where I live, that used to be a reliable way to mute the ads, but they've started disabling it as word gets out.

I accidentally invoked the admin menu once while screwing around with all of the buttons on one. It was kind of a thrill at first, but then I was worried I'd get caught on CCTV committing a "hacker crime" or some other fascist bullshit, so I just exited out of it.

I don't remember the exact sequence but it was something like I pressed all 4 of the outer buttons at the same time then pressed all 4 of the inner ones at the same time.