Rune of Objection does not seem to work on the debuff "Curse of Emo" which is caused by using the emomancy spell "The Cure". I've cast the Rune of Objection on several monsters while under the effect of this debuff and I neither lose the debuff nor do they gain it. There is not any indication that it is being resisted by the monsters, and the amount of times I've tried this makes it unlikely that this would happen every time anyway. (It also occurs to me that this may be an intentional phenomenon due to the fact that the Curse of Emo debuff is a side-effect of a player ability. If this is the case then the bug is that the description for Rune of Objection is inaccurate and needs to be rewritten.) EDIT: Nevermind
Not a bug, intended. Curse of Emo does not have the bad="1" flag that flags it as a debuff. The fact that it specifically states that it cannot be removed with usual methods should tell you something about that.