So very much this.
These things should not be available to buy for the general public, or anyone without safety training and equipment.
Remember: Don't stare into laser with remaining eye.

Edit: It is true that there are lasers that can damage camera sensors and not eyes, but they are infrared outside of the visual spectrum, and absorbed by the water content of the human eye. BUT STILL DO NOT USE LASERS OUTSIDE OF CONTROLED ENVIRONMENTS