Who is buying all these green lasers?

Is there some sort of secret drug manufacturing step that requires green lasers? Ick... is there such a thing as Laser Play? Does it have to do something with DRM/DMCA/BluRay? Are they about to be banned or something?

Everywhere I turn for Christmas I see lasers. Lasers! Buy a Green Laser! It's green! It's brighter! Was my old laser weak? Who is buying these green lasers?