Lasers (click here) are dependent on wavelength. That wavelength can be alerted to make them safe when used for celebration or with recreational activities.

Lasers have been used in science for a long time. The military conducts research on lasers, but, in the "Age of Indulgence" lasers are now among the public and potentially used by criminals against aircraft. We know an Israel jet flying out of Africa was once hit with lasers but was not effected.

I think there is a very viable debate about lasers and their appropriate use including modifications that could make them very dangerous.