Genghis, agreed, but consider this scenario:-
Aircraft A is a radio-equipped Tiger Moth inbound to Waltham. As the Moth arrives overhead, the pilot sees from the windsock that the wind has changed and now exposes the active runway to a crosswind which exceeds the limits of aircraft and/or pilot.
In Ops, they have not yet decided to change runways. Perhaps they are busy and distracted and have not noticed the wind indicator. Perhaps they have not yet heard from an instructor in the (unusually quiet) circuit that the wind has changed.
The pilot of Aircraft A tells Waltham Radio that he intends to use the runway which is now into wind. What does Waltham say in reply? Whatever is said, they can't stop him. He begins to position for his preferred runway.
Aircraft B is a non-radio Yak also inbound, having received a telephone briefing before setting off. Arriving in the overhead shortly after the Tiger Moth, the Yak pilot sees the signal square, with the T indicating the runway which he was briefed for. He also sees the windsock but knows the indicated crosswind to be safely within his capabilities and his aircraft's limitations. He starts to position for the signalled active runway.
The circuit is otherwise empty, but neither aircraft has seen the other. The radio operator, on his own in Ops, is distracted by an irate birthday trial-lesson punter complaining about the fact that no-one told him he'd have to go in a scary aeroplane with only one engine, and has therefore not noticed the Yak.
What happens next?
NB nothing said above implies criticism of any of the notional participants in this scenario, which is in any event taking place in a parallel universe that does not exist. I'm genuinely curious, and would welcome responses from Genghis, others using WW and similar fields, and any instructors or a/g people reading this.
Should maybe be in the a/g operators thread, but follows on from postings above.