Board Thread:General Mod Discussion/@comment-34241117-20181008184828/@comment-34030170-20181119000239

Just gonna refer to the main post, Dol Guldur isn't unique in not attacking you unless you've got negative alignment, every Orc faction except Mordor (and technically Utumno) leaves you alone unless you attack them. Trolls will still attack you if you don't have +100, no matter what faction it is, though.