A Possible Solution
This is probably going to sound like a ridiculous idea, but looking over it, I see that it might be able to solve our problem with non-minecraft players posting on the minecraft forum. Due to the recent issues with the minecraft server rules being disregarded on the minecraft forum, would it be possible to make a private minecraft forum? With the idea I have in mind, it would require manually adding every minecraft player to a permissions list to access our special forum(which may become a bit tedious as the server grows), but it would keep out any unwanted guests. Similar to the workings of the minecraft staff forum, a special minecraft forum would be created whereas only our minecraft players(and the forum staff, of course) would be able to access it. Do post some thoughts/concerns. If you do not play our minecraft server or are not part of the forum staff, I'd prefer you not shoot down the idea. If you are in either of those categories, do feel free to tell me this won't work.