@rickycodie: have a link to the blog?
The knife-example seems to suck to me. It is just a question of lack of knowledge, rather then having anything to do with the "golden rule". Maybe also a case of what someone wants at a particular time, rather then what he wants in the broader picture.
I think the "golden rule" is not a bad good rule of thumb, dealing with other people. It is not like any rule will relieve you from having to use your mind or anything.