Does detector LIGO work on freewill only?

[theBorg]

The technical description of LIGO shows, what the mirrors do not hung freely, isn't it? You have the information from the Wikipedia, haven't you? The Wikipedia is way too primitive source of information.

I haven't read the Wiki yet.
The mirrors are suspended from elaborate multi-stage pendulums in order to be insulated from the movement of the ground, and enable them to move practically freely along the beam axis which is what matters here.

If they are rigidly attached to the arms of LIGO, then, there is the True God. They are attached rigidly, according to the theory of the LIGO: Soviet Physics JETP, v.16, № 2, 433, 1963). To not offend the atheists one writes everywhere the lie: "the mirrors are free-moving". The Science is about the politics, and the politics likes the tolerance.