Schools shouldn't limit your speech like that. They seem to think that talking about drugs will increase the use of them. Such a thing is insignificant to those who are all ready stupid enough to try drugs.
Also, I don't have a problem with you retaliating against him. He made this personal for you. The issue between you and him is not just a ROBLOX and Blockland "war" thing. I do advise that you be careful in how you go about your revenge.