I'd consider legal action. I'd also consider media action. I'd also consider other actions, especially if they did this to my flesh-and-blood against my consent, and especially if they did it twice in a row. Good luck to you!
Separately from the school issue, you may want to look into a fluoride detox protocol for your son -- the sooner it is removed, the less damage it can do.
Thank you @liberyteeth I appreciate your advice and I am currently working on all of those things minus the media for now.
Ahem: Steemit is a media platform.
:D
But yeah I understand you also. Good luck and hope he stays away from full-body toxins!
Seriously, if one can't prosecute people who harm one's children, it reminds me of JFK's quote, "Those who make peaceful revolution impossible will make violent revolution inevitable"...