I think having an option to disable mob spawns within your claim would be a great idea(if possible). Having bats everywhere in darker areas is annoying, and if you're in the end you have endermen to worry about. Some people could also just not want mobs so spawn in their claim, sure mobs will still be able to walk into said claim, but at that point it's just a skill issue. I don't know how this would affect spawners, hopefully it doesn't so this could actually be implemented. That's all, have a good day/evening/night :>