You don't have to physically be there even today to shut down an intersection. Just drop the intersection you'd like to shut down into some form of social media

You don't have to physically be there even today to shut down an intersection. Just drop the intersection you'd like to shut down into some form of social media followed by these car sideshow people, tell them everyone will be there, they show up and what do you know everyone you've told is there, besides you of course, tearing up their tires and creating congestion for probably dozens of blocks nearby this intersection where nothing is moving at all except these fast n furious wannabes. Not to mention the cost to the public of rousing cops and potentially helicopters to deal with this. Much more effective and costly to the public than this strategy that only results in a bit more traffic than usual, and can be done today. Maybe its already being done.