This makes me laugh, I've got to say most of the trouble isn't trouble atall but gobbing off. The last semi againt these numbsculls was a classic, big groups of mid 40's chavs larging it up, gesticulating and mouthing off without any hand to hand combat.
Christ, at a service station going home a group of about 10 tried to intimdate every blue in the place, until my mate said 'watch your back' as the big loud mouth deliberately barged into the back of me (now I'm a good 15 stone) and bounced off finding himself on his arse on the floor, funniest thing I've ever seen, next funniest was my sister telling him off....classic!!
Thing is, if there is a group of you, don't get involved in a slanging match as nobody wins or loses anything, you just show your arse, let the knobheads think they are all it and see how dumb they look.
They will piss off soon enough, trust me, I've been around football trouble, it's often handbags unless it's arranged.