For one, i believe that having a "bad" opinion that everyone disagrees with should be similarly acknowledged as the "right" opinion. Let people see that "bad" opinion and let them decide if they also consider it as one.
Ability to sort threads by the amount of comments would also work. Make it easier for us to see what threads are filled with people who engage in a discussion. Even if that discussion boils down to two people calling each other names, it's still an interaction between people and that's never a bad thing.