Unfortunately, I think it's too late to change that. There will be people that are attending that do not frequent mcb, so if we (as in the organizers... not me) change the rules, people may show up without enough paint, or proper tanks for that type of game.
The more people there are, the more valuable a sword is. That should make for some interesting/comical games. I'd love to see what happens if everyone runs out of ammo.