It is a pleasure to see members of this foul and egotistical race chained and helpless. But as I contemplated killing it two things struck me. Firstly it would speak to me without trying to kill me unlike most of it's it's arrogant kindred and secondly that live study of such creatures might teach me something useful. As it turns out I learned that talking to Erudites is annoying.
(At lvl 15 I believe the jailor is a viable solo camp the cell is a safe place to sit and heal and releasing the captured Erudites adds a small bit to the xp. In any case all together it makes for good xp and fast leveling in what is an under hunted area. I like the Warrens it's actually an interesting place with alot of variety.)