I don't mind at all hearing from someone when they think I have just written someone else's assignment. It definitely has happened more than once. But I cannot take the argument, etc, very seriously either. I doubt that many of my "answers" made it verbatim into someone's homework (I don't intend that), but if they did I could care less. Why should my priorities be curtailed because of the priorities of Prof. Stalin, et al.? What have they done for me lately? I don't see any "ethical playing field" there AT ALL.
I certainly wasn't thinking about you, MK27, when I wrote my comment. I wasn't aware that had ever happened to you -- I was thinking more about the new users with low post counts who post solutions (for "street cred?" I don't know)