It's not worth the risk, do not ever trust your school administration to do the right thing - you will be setting yourself up for big disappointment.
Joe Richkid and the Numbnuts don't want to hear about how their lasers are dangerous. They don't care about facts. They will just consider you a pain in the ass if you try to tell them anything, no positive change will be accomplished, and at that point you're on Richkid's radar of grief and misery.
Avoid. Staying off Richkid's radar, and off the school admin's radar is the best bet.
ETA: If you haven't done so already, I would advise that you not let these idiots become aware that you have any high power lasers. Do not show them how to build one, definitely don't let them play with any. Don't let them know such things even exist. They will want one at that point, and spoiled brats get what they want. If those brats get into trouble, let it be for "fooling around with laser pointers", it's much better than a front-page headline such as "STUDENT BLINDS SELF, OTHERS WITH HIGH POWER HOMEBUILT LASER WEAPON".
Where did they learn about high power lasers like that, I wonder? Oh, right YOU told them about the stuff and even showed them one. Think the brats won't mention that at their hearing or whatever? Think again. Tell those kids about lasers and they will sell you out the MINUTE something goes wrong with that info and they will DENY that you ever told them any safety info. "It's not my fault, officer, he told me how to build the thing, he never said it was dangerous, I never would have played with it if I thought it was dangerous, HONEST, OFFICER!"
I can't say it strongly enough, AVOID this issue entirely.