What about incorporating a banner in the Territory Wars in which the leaders and officers of each guild can display a message to both guilds. Each guild has a separate banner. It will allow communication between the guilds. The leader and officers can report the other guild for derogatory language.
In the last TW, the opposing guild was losing motivation to battle as my guild was 1,500 points above them and their rosters were being close to spent, it would have been nice to give them encouragement and that we had fun battling them.