Not quite labeled the Tim Taylor Clause, but in short, the warning is to make sure your lasers aren’t facing straight up into the sky, since you know, planes.
Yes, as good television taught us, mass amounts of ground lights can land a plane from Alpena in fog, but laser lights shooting up into the cockpit can be blinding.
Unfortunately, despite warnings listed on the laser light projectors themselves, there have been several reports of pilots being blasted with festive red and green laser lights in both countries.
Without adding that shooting lasers into a flight path is illegal and comes with either a $100,000 CAD fine and 5 years jail time, Transport Canada advises decorators to, “Create a nice display, but don’t point it into the sky where it could pose a risk.”
According to the FAA Modernization and Reform Act of 2012- Section 311, using lasers to disturb a flight path can result in up to a $250,000 fine, and as with their Canadian cousin, jail time.