Really don't see any need for this.
Part of the reason trouble is at an all time low is due to this. As said above, there will be beer flying everywhere if we score. It's bad enough in the concourses at some away game getting covered in a beer shower.
If people want to be drunk, then yes, it won't make any difference where they are allowed to. This will just be seen as a rubber stamp in some quarters to act like bloody idiots.