In the previous event SylverXI thought up good rules of gathering teams before a match.
Each ref creates a prep room in area 19 for each team. A team may enter to the room with any count of people. Then they ask ref to close room and a fleet sends a real configuration (20 ships) to "bravo". Then a fleet leader chats : "configuration is defined" and a ref screens all ships in "bravo". Fleets cannot change final configuration.
After both teams are made this preparations they are invited to the battle room :)
For an enemy team it's not possible to know about your setup so you can surprise them :) And if someone crashes we can wait for him a couple of minutes, because he cannot change his ship anyway.