Ok, I went to build big base, considered as hall. I don't like when players go to my bases (only when I am living with him, or it's my friend,cousin, player that started with me etc. And I want to know what material what kills/keep killing player. Only thing that can be to is Minicio Crop on every stone brick I build hall from amd build hall to level 256.
If you build far enough from /rt's and spawn then there shouldn't be too many visitors. If you really want to prevent other from entering then use doors. They are protected and can only be opened by players that are on the trustlist.