[Xythar]

D'oh.... We dealt with that, and I really don't want to retype all the ideas....

Anyway, you can go and find the actual thread, but basically what we figured was that at least 4 people from the kingdom going to be attacked had to be online before an attack. There were a bunch of other solutions to that problem too, but I'm very lazy. And laziness = not wanting to type them all.