Copyright infringement: an act of honoring or theft?

Recently, a fellow writer posted an article written by another author to our writers' group. He was trying to be helpful. But he openly admitted he didn't have permission to reproduce the article. He hadn't bothered to contact the author and ask, and the article author isn't a member of our group, as far as I know. This led to a discussion on the issue of copyright infringement.

My fellow writer's argument: he was trying to be helpful, was promoting another author who would be grateful for the...