Yow. I was annoyed to find my Audible downloads in my Archive in the first place (they don't show on my K2), because the Kindle is the last device on earth I'd ever use for them. But the possibility of accidental download, with no ability to cancel? Ugh, that just makes it worse. FWIW, I'll send feedback today too--I'd strongly like them to add a setting so I can't see them in my Kindle archive, or at least so they can be separated from the ebooks.
Thanks for the head's up on doing a hard reset to escape the download as well!