When was the last time you were on a plane? They're extremely high in the air to the point where you can't even see people walking on the ground. Even when they're not at the peak of their flight. "Hello police, there is a light down there somewhere" Is it literally going to leave a beam that far? Even then idk.
Yes.. it's blatantly fucking obvious when someone is pointing a laser pointer up at the sky.
People on the ground will know where you are and people in the air will, too.
That's why they are so absolutely awesome for astronomy
"Point the telescope at that star"
"Which fucking one of the thousands?"
Turn laser pointer on. Point your seemingly infinite beam right at it.
"Oh that one"