I don't think it's been clarified that spectator side coaching is removed, just the "spotter"!
As for policing the pits, that is far more likely to lead to confrontation for the Millennium staff, far easier to get the refs to eliminate players and pull penalties when somebodies mum accidentaly blurts out something.
Spike, which fight, there has been more than one at Basildon (at the Millennium events, I presume you mean). I think the one you may be alluding to was on the spectator side, however, the same characters were also involved in a pit-side scuffle that event too.