Probably for the same reason as me Having to run from ground to coach under a barrage of missiles, coaches pelted with bricks on departure etc etc. Never again.
Be surprised if they sell them after taking a 10yo in 2000 we were spat at, verbally abused & had hot food thrown at us... dead hard them bluenoses doing that to a 5ft tall woman & her bairn
i went season before last had no trouble not doubting what happened in 2000 but maybe they have changed or improved safety