As an engineer, I propose the following design: Have a mesh curtain descend from the ceiling and be affixed to the top of the glass. That way, people can still shout at the player's and refs, nothing can be thrown on the ice, high bank shots won't work, everyone can still see the games and the curtain can be quickly detached by rink staff and retracted for other events in the arena. What do y'all think? -Richard E Vehlow RPI '91, '93 mechanical engineering [log in to unmask]