Here is the Mizzou tailgate survey. I guess you can read whatever you want into it, but there's a heavy emphasis on alcohol. Rumor has it they're considering an alcohol-free zone.

On a side note, notice the first question. Are you serious? I'm not familiar with the third gender. Folks, your penis/vagina is not a state of mind.
But let's say there's a lot of people saying they're tired of the drunken debauchery at the tailgating. I'm not really sure what you can do about that. People are going to drink and some will drink too much. A ban on alcohol is patronizing and will anesthetize the atmosphere. Adults can determine if they've had too much. If the problem is unruly behavior, that's what the P.D. is for. I suppose creating an alcohol-free zone might be a decent compromise if those who really want to be insulated from so much as seeing a heathen with a beer will feel better. We could also buy them blinders. In Oklahoma, you can't carry your beer to the car unless it's in a paper bag. Similar concept, I guess.
Just a wild, baseless guess...Mizzou will start a "drink responsibly" marketing campaign this fall.