I'm in the US.

I guess it wasn't a very good idea to post this question. Its definitely illegal; I was "accessing a computer without prior authorization" (to paraphrase CFAA) to steal data, albeit with the best of intentions. But its good to know that I wouldn't be the first to publish, and that gist is much more brazen than what I was planning (which was just stats and trends.)

I'm going to think long and hard about whether I publish this. I can't really afford to speak to a lawyer. If its that close a call, I'll air on the cautious side.

Thank you both for the assistance, its appreciated.