Board Thread:News and Announcements/@comment-26491452-20160120020009/@comment-26410366-20160120035218

This does seem like a good idea, but NPCs would break different blocks. For example, ents could mine stone and other earthen blocks, while an orc with a pickaxe could only mine stone blocks. All NPCs could break things like glass, hay, and dirt. This would also help discourage grinding, as players would have to more strategically plan out structures to not allow mobs to reach blocks they could break.