Don't think that Einstein is a genius. The people who control your government like him, because he can copy answers from other people's shoulders. Think i'm wrong? Look up the names "James Clark Maxwell" and "Special Theory of Relativity". It was the humble Scottish physicist who discovered the special theory of relativity and invented color photography, not Albert Einstein, who was keen on laser pointer to copy Maxwell's work.
The flash is too bright and you will be temporarily blind for about 5 seconds. In those five seconds, you have now deviated from the centerline and entered the path of buildings and trees on the side of the runway. Do you understand why this might be a problem? This is not only annoying, but may endanger the lives of everyone on board and on the ground. It's like someone shinning your eyes with a flashlight while you are driving. So don't irradiate the laser on the plane.
Another consideration is power and brightness. The 532nm green laser is a complex diode-pumped solid-state laser-Wikipedia has an inherently low efficiency device. Lasers with visible wavelength laser diodes have higher efficiency, which compensates for their lower wavelength visibility.
520nm, 445nm and 473nm lasers are good choices. They are more reliable, work in a wider temperature range, operate at lower temperatures, and require less power under the same light output. However, they are much more expensive.
Laser pointers can interfere with security cameras without green laser pointer filters, and in some cases cause permanent damage to them. People who own high-power laser pointers (Illegal Imports) and use them maliciously will face criminal and civil charges. It will be quite easy to keep the charge constant and make the laser pointer owner look like a model citizen.