You definitely need more labels when categorizing sentiment than just emotion/valence. Possibly even degrees/confidence by the annotator. Heck, have several annotators label it, and derive a "Controversial" feature based on the spread of the ratings.

Only tangentially related, is your username a pun on "Nostradamus", "Nostril", and "Nasal Demons"? If so, that is very witty!

http://www.catb.org/jargon/html/N/nasal-demons.html