I mean, it's not fake, just unpermitted?
Even here in the states, where it's my understanding is a bit looser with rules on gatherings you can't block traffic w/o a permit.
So... someone put out advertising for a parade and never got the permit? Why the front page?
You could have done this in the 90s with flyers, payphones and word of mouth, it's a bit weird to overemphasize the "social media" aspect.