Hanoi fans are called "Contras" I am one of them, there are different sections for the supporters, we have tried flares but the police and fireman are there and put them right out. Hanoi is the capital and they don't let stuff like that go on. But an hour and a half away anything goes! Haha, the fans in Hai Phong are crazy and so are the people. Sometimes when I am there they will say something to me because I am a foreigner and the last thing they ever expect is me to answer them and know what they said as I am talking to them in Vietnamese, they just have a stunned look on their face, haha