[WestCoastGal]

From that website......(I don't know if those would be strong enough to lock onto an approaching plane)

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Queer eye on the hot guy
In recent years, pocket lasers have become increasingly popular at gay dance clubs. Paco Garcia explains that club-goers often use the green laser pointers to add to the excitement on the dance floor. “When you see a buff guy, guys point pocket lasers on him. That way he stands out and he knows that we think he’s hot,” explains Garcia.

Hundreds of inexpensive lasers were sold within Cleveland's gay community alone this Christmas, some for as little as $15. The lasers, while strong, are completely legal.

[Darksheare]

My little red laser pointer that I use to annoy the cats is strong enough to hurt your eyes should you be foolish enough to get it in your eyes.

A green laser pointer would hurt a heck of alot worse.
It is more in tune with the part of the light spectrum in which humans see the best in.