Dear Mr. H. Dog,

There is some debate wheter or not these lasers do any harm.
Another rumour is that fast spinning objects are invulnerable to high
power lasers.
Well, combine those two.
You are going to use a low power one so the spinning does have to be
very fast.
I think the roll rate of a plane will be enough.
So, roll your plane as fast as possible on final approach and see what
happens(Do not forget to level wings just before touch down)
Present your findings to the FAA.
Maybe they make it a rule that everybody has to roll their planes on
final because it is much safer in case of a terrorist attack with laser
pointers.

-Kees