The real concern is that they are apparently able to "track" a moving aircraft at 300-500 mph. ~175-250 mph coming in for a landing at 6 miles. The laser isn't just appearing and dissappearing, it's consitently visible enough to be identified as such. Not an easy feat with a pocket pointer, even if you could find a green one.
State your source of this information please!
Remember, just a quick flash of green light, only takes a split-second to recognize as being unusual.
I could randomly flash a laser at you, and you would immediatly recognize it as such.