 Having like monkeys essentially, this is what it leads to. When you drink alcohol, you lower your consciousness, ultimately you become your body, your brain, your higher consciousness, not working at all anymore and therefore you behave like an animal. This is what we saw here, just a bunch of monkeys hitting each other. What bad can come out of this? Honestly, think about this. Less hooligans? What is bad about not drinking in the stadium? For me, that's a fantastic way to keep the game civil.