Yep, we´ve also heard of the Hooligans-problem. I hope the police can fix it... the border patrol has sent some groups home at the border. The cooperation between the German police and its European colleagues was pretty good, there are also police officers of several European nations patrolling in Germany to help their citizens with the language barrier and to deter them from behaving inproperly.
England's soccer hooligans cause enough troubles already. But maybe things would be different this time.