Wars and respawning.
 

Now, not that there have actually been any wars lately, but just in case there are, I think something like this should happen.
First off, in addition to the kingdom status of "Allied" "Neutral" and "Enemies" there should be an "At War" status.
If it's possible, when two kingdoms are at war, anyone in Peaceful mode stays in Peaceful, but when attacked by a member of the opposing kingdom, takes damage normally. If your kingdoms are at war, and you are killed by a member of the opposing kingdom on their island, you should be sent to a prison area. If you are killed anywhere else in Graal, you should be sent back to an infirmary on your own island. After the war has ended, all patients can be released from the infirmary, and then the Kings can negotiate for the return of prisoners.
It's much harder to rush back out into the fight when you're in jail or in a hospital. ^.~

Anyway, just an idea.

I like it, prisoners of war bwhaha :o

Sounds good but it would probably get abused in some way. :o

Yes, but if everything on Graal were based on that idea, things would be quit unfun. For example, saying that allowing players to run kingdoms could lead to abuse (as it often does) and allowing that to effect a decision, would mean we have an official leader staff, and RPing becomes limited.

At war should NEVER override peaceful. If you don't believe me, read around about Flaming Aura and Horses. Until people out of Peaceful mode have a way to not get killed and lose all their stuff without a snowball's chance of countering, nothing like this should even be PROPOSED...