Ah, Coolaroo Rovers - the 'club' based on a Pentridge Prison Release Scheme. We played them in their first game at their home ground in Dallas. The game finished about 5 minutes earlier than the final siren with spectators running onto the field for a fight and the field umpire running off and disappearing in his car. Two divvy vans were required at every Coolaroo Rovers game for the rest of the season.
Never had the pleasure of Coolaroo but sounds similar to Fawkner in the early 90s who had to have police supervision at games. Think they were in B grade at the time so it was a big deal. Remember actually considering that somebody might be killed - frightening stuff.....