Does detector LIGO work on freewill only?

[Alex K]

I guess getting a clear statement out of you about your criticism of the LIGO measurement is hopeless?

Let me reformulate. There is "strong equivalence principle", see Wikipedia. Therefore, the observation in small laboratory is the same throughout all space and time. Therefore, by looking at the color of the laser radiation one can not detect the incoming gravitational wave. But it was detected this way.

What do you consider a "small laboratory" in this case? The whole Ligo setup with the two arms? How do you justify that it is a small laboratory in the sense of the equivalence principle and to the precision at which the observations are made? (after all, the equivalence principle is only strictly true for infinitely small systems or else one needs to neglect higher order effects). And at which point does the interferometer look at the color of the laser anyway?