We have a green laser pointer where I work. It is the only eye safe one we use. Cost was pretty steep, about $100.00 for a pointer!
So the question is, could some teenage pranksters in several different areas of the US purchase or engineer one of these things, position it anywhere from 0-12 miles from the airport and target a plane at 3000 feet? If the plane was 6 miles from the airport, and the laser was positioned 3 miles from the airport, and considering the 3000 ft altitude of the plane, is this possible with a laser any old Joe can purchase from any old store?