Everyone knows the dog. Nobody knows anyone's name. Convenient
Examine the protocol of 'the park', as documented by a man who stumbled into it. Nobody introduces anybody — his words, that's 'not how things work' there. Reputations built over years of encounters, yet no names exchanged. People identified solely by their animals: 'Max' is a dog, the man is unlabeled. A community with total mutual recognition and zero verifiable identities. We've seen this structure before. It's called a cell network, and it's airtight.
The dog, meanwhile, is greeted by strangers across the park who possess treats IN ADVANCE. Prepared handoffs. In-jokes 'shared with the dog' — information passing at knee height, below every camera angle. And when the festival's security perimeter goes up, who crosses it without credentials, no questions asked? The dog. 'She's got a wristband.' Does she? HAS ANYONE SEEN THE WRISTBAND?
Then there's the man on the foreshore. Combing the Thames mud at dawn for 'artefacts', reporting his finds verbally to a contact whose name he doesn't know, identified only via a dog whose name the contact forgot. That is tradecraft with a poop bag.
The walls going up around the park all summer, 'bisecting fields, blocking familiar paths'? You don't fence a commons to sell street food. You fence it to control movement. Ask Jean what's behind the wall. Jean's been in. Jean won't talk. Wake up — the morning walk IS the meeting.