Boy...I'm sorry, but is that tone really necessary?
What did you want a staff member to say? That they would bend to this one request that they change their entire setup and rule-set for a part of the convention only three months ahead of the convention?
The fact is, the Hall of Discord panels need to be 21+ for the fact that there is active sale of alcohol going on in the same room. It's a fact that I have had to deal with for a few years, it's a fact likely many more attendees will have to be patient with, but it's simply a fact of the convention.
If you want a direct answer proper, PM a staff member or e-mail BC's info e-mail address. Don't complain on the public forums when these staff members, who really do try their best to answer every question we have on this board, can't answer every facet of your question, please.