There isn't one.
Corporations don't have a conscience, people do.
That means that every time you say, "It's just my job," or "My department has a policy," or "All I do is work here," what you've done is abdicated responsibility–to no one.
It's convenient and even comfortable to blame the anonymous actions of many working in concert on a evanescent brand or organization, but that starts you on an inevitable race to the bottom. Organizations have more power than ever before. They are better synchronized, faster, and possess more tools to change the economy and the people in it than ever before. And the only option available to the rest of us is for individuals to take responsibility (it's not given) for what they do and how they do it.
The very same tools that permit organizations to synchronize their efforts are now available to you and to me. I guess the question is: will we use that power to humanize the systems we've created?
PS It's not just about being a good citizen: when bad behavior comes back to hurt the company, it hurts you, too.