Yeah, I bazillionth that "not without a reason". And if it was to be done, there should be a haven for those of us that don't wish to participate - saaaay, the cities. Seeing as if some git tried to take over Gugrontid they'd get Malco's hammer to the head faster than you can say "NO FEAR!!!", and mass murders in Hydlaa would be dealt with by the guards.
If you want to take over the cities and duke it out with another guild just for fun, take it to EZPC.
If you want it to do it on SkyLab, have a reason, play out the events that build up to it, and when the time comes to go to war, maybe have each faction camp in the BDroads, march to battle in formation, have the ones leading their troops into battle smack talk a little beforehand, etc.