It's not just some peoples responsibility to do the right thing, it's everyones. It's just that some people choose not to do it.
When you have a choice between right and wrong, choose right. Don't talk about someone who has done nothing to you. Don't fight someone who is only trying to help you. Don't criticize the guy in class or at work who doesn't talk, because he wants to be the best. Don't laugh at the guy who is 21 and still a virgin. Don't assume that you are right when someone else is clearly showing you a better way.
Basically what I am saying is, do what's right, not because you have to (because you don't), but because it is right. If everyones doing bad things, and you do the same, you're just a follower. You will never leave an impact in this world. But if everyone is doing wrong, and you do what's right, then you will find your self in a small group that we like to call........ different.
