In reply to Jon Ang.

Why should being a “volunteer” shield anyone from “taking shit”?

Common decency, I suppose. If someone is giving up their free time to do something for you at no cost to you (offering support, for instance), it seems like a nice thing to do would be to at least not expect them to just submit to you and quietly "handle the heat."

Of course, there are plenty of entitled individuals who feel otherwise.

There is no absolute answer that question, it's just a matter of opinion and character.