A good reason?
"We don' need no steenkin good reason, Senor!"
This thread seems to have transmogrified from a couple of numpties shining their laser pointers at aircraft into the do's and don't of Laser use by Airfields.
I never have a reason to fire up my lasers except that I want to appreciate the beauty and purity of the beams and displays.
Long may I continue to be allowed to do so, unfettered by "The Man" poking his nose in.