Aside the fact that most awards are based on opinion or perspective, i wouldn't add title for negative things (such as best antihero/troll) since it'll create more drama and boost their ego. Maybe we can borrow algorithm score for bumping (obvious there's major advantage for some member)
Who knows, maybe we need a little drama. But Antihero, in my opinion, is not a negative nomination. As I wrote above, thousands of users may not like a user just because he left them a reasonable negative feedback.
Or are you talking about antipathy on the part of very active members of the forum towards certain individuals?
Yes, but also antipathy of any individual/group towards certain individuals/group (could be race, rank, nationality etc.)