Hi,I have some experience with command blocks so I can help you to keep your server/realm safe from hackers & griefers.
I can add spawn protection (unbreakable blocks,no pvp).
And I can add protection for players properties so only owner of property can enter his own building.
I can do many other things.
If u need help feel free to message me on
Xbox Live: minotaur411
Reply on this thread
Are you also gonna force them to live in a 12x12 area or no?