What if colonies from another kingdom could form around your island, They could be Hostile, IE: Mean Human or Goblin colonies Neutral or Freindly IE: Nice Human colonies they would come in big ships and trade with you if they were nice or attack you with a bit of stragegy (A little break from the no-brained wild monsters) if they were hostile. They would also start building houses and such. Attacking them would hurt your relationship and making offerings would help your relationship. This could be in the option menu like this: Colonies? The thing would start out on both, But clicking the button would make it Freindly only and clicking again would be hostile only and clicking it AGAIN would be off and then again would set it back to both. And you probably wouldn't be able to go to the kingdom's mainland. That just wouldn't be minecraft.
It's people like you that i added the idea of turning it off for, That way people who don't like the idea don't have to have them.
My Pathfinder Campaign for the denizens of MCF: http://www.minecraftforum.net/topic/1939035-where-are-we-sandbox-pathfinder-campaign-ooc/