not-condoning the behaviour, but it dont take a genius to know, if ya get a large group of people, supply em wi alcohol, n then deprive em of what they had gone to see, a small minority of em are gonna kick-off, its that simple, makes me wonder, was the equipment tested pre- match?
this would have happened anywhere given those circs, n not just at a football match, can envisage the same thing happening at other venues, its not rocket science.
