Also peaceful farmers who defend claim in party also get an advantage here, as i wrote earlier couple of first kills can be free, and cost decrease over time. So if you not killing that much it would be as it is now for you. The main problem here that a village "warrior" who supposed to defend a lot of people going to be disadvantaged.
And maybe village chieftan could assign some players to have this murder privileges on the village claim, like two maximum on the village, five in some bigger formation, when and if it's implemented

Making them warriors officially.
I was thinking of suggesting something like not needing black skills on your own claim, but additional rules ( like no claiming where another character stands (or lies), and still requiring black skills for hurting summoned characters) would need to be added to prevent alt abuse.
Sound's reasonable, but mostly if someone didn't have lp to purchase black skill's and get's attack by griefer he probably get's owned anyway. That of course leaves peaceful one's that would find it unnecessary to buy them, even when they got enough lp, and newbie who get's advantage on another newbie while on his own claim, so i like that idea.
Be careful when you are invited in for tea.
In rl one should be careful to, especially when guy talks about candies in his truck.