I think the PA allows you sing in unison, if there is lag & the echo makes thing difficult, the PA can come back in & take over. As you say, it must exist somewhere but not common
Maybe back in the day but not now. Now between the ground announcer blaring unabated nonsense through the PA, FFA mandated "family friendly music", the ridiculous countdown & a desolated RBB who have been beaten into submission with a mix of bans, security idiocy, riot squad power trippers & inept stadium management. Is anything really going to happen?
Maybe if things were spontaneous & less structured. Pre game is planned down to the minute, everything including ads/breaks, stupid countdown & silly stuff. Pick something, get RBB/club together & make it happen.
We aren't members. We don't own shares of the club nor do we have voting rights. The club and the board aren't answerable to us.
Don't get confused with club members vs season ticket holders which we are the latter.