They would and already do against all kinds of light pollution (https://en.wikipedia.org/wiki/Light_pollution https://en.wikipedia.org/wiki/Light_pollution) I

They would and already do against all kinds of light pollution (https://en.wikipedia.org/wiki/Light_pollution https://en.wikipedia.org/wiki/Light_pollution) I think it is doubtful whether it would help in today’s climate, though (“why would these elitist scientists have the sole right to decide what we can do?”)