This habit is extremely powerful. There's no way to require people to do it, but people who do it, at least know the arguments of their opponents, are in such a better position to get what they want that people who don't are left standing, mouths open wondering what happened.
And it's extremely timely as just two weeks ago, President Obama gave this quote:
"I don't want you to think that a display of your strength is simply shutting other people up. And that part of your ability to bring about change is going to be by engagement and understanding the viewpoints and the arguments of the other side."
People don't realize that college already is the safe place where they can develop the habits of empathy and conflict-management. Getting called "bitch" and seeing mice are the least of their problems. Those are going to happen in the real-world no matter what. College isn't a place to preserve themselves from these inevitable, superficial insults, it's a place to develop leadership, contribution and cooperation abilities to get big things done like feeding, improving, healing, leading the world, etc.