Agreed - I don't enough to say about this particular project, but the lasers in LiDAR sensors do have the potential to be powerful enough to harm eyesight, so I would advise caution. This is not a concern for most commercial sensors, as they are constrained by regulations to a certain power for this same reason. I'm guessing there's no rules for DIY, but it's something to keep in mind if a product came out of this.