Wilder.
ACMD apparently is an acronym for Advisory Council on the Misuse of Drugs. I think it's obscure enough, and not really the type of drug reference we are talking about - we are more concerned with names of recreational drugs. I'll have to check with the admins that were in the server and see what their reasoning was, in case there's something else I'm not aware of. I don't think there should be a problem with your tags.
Admins have to make calls in servers, and our admins are all ages and backgrounds. We train people to not look too hard for name changes, but with your tags not having an obvious meaning, they probably googled it and all they could see was reference to drugs, so they made the call.
Like I said, I'll check with the admins and see what the full story is. Until then, if you're asked to change your name pls comply for now, but I think we can sort this out.