My take on Art's Query.
First, I'm glad you're no longer dead. Second, I don't think you behaved inappropriately. I vastly prefer getting actual feedback on articles as opposed to an empty rejection letter (or even empty, but grudging "it's not very good but I don't want to say so" acceptance). Third, in my discipline, really good (as in, good to the authors) journals will send you an editor's summary of a reviewer's comments; I've never gotten the actual things. Knowing nothing more about the case that what you've described, my guess is that what's freaking them out is the shock of seeing the raw comments instead of an editor's summary of the same. So my guess is that forwarding the emails probably caused the ruckus and thus I favor the Brave New World theory. But, if you think about it, it's not really any different in content from what one would want: the comments, dammit! I don't think they should be hurt and angry, but can also see a pragmatic case for summarizing rather than forwarding in the future, as that's what most probably expect.