You are right. It's a not a part of European/English culture that is in any way praiseworthy. I guess it depends on what you class as causing a scene. Chanting and singing in a rowdy manner? rowdy celebrations/anger at defeats? chucking your drink in the air in celebration? It's all very moronic, but wading in with crowd control when those things happen will just make things worse. I imagine like you say, after researching the matter, dehydration/heat stroke/exhaustion is the more likely danger. Alcohol is only served between 7pm-1am and you are only allowed 4 pints of Budweiser (at £12 per unit). The problem is that the UK Media think massive queues for food, drinks both alcoholic and not, and the toilets are extremely likely. The Sun in particular seemed to think there weren't enough food/drink outlets and toilets for the crowds expected.