Noticed some minor oddities in the Amazon account (marketing information in one device set to share, which I always disable; another device loading at a peculiar resolution), so I used the Amazon option to log out of all sessions -- turns out that deletes all of the devices on the account. A few hours of restoring. I've only had one apparent hack on these peregrinations (when Amazon shut things down proactively), coincidentally in this city on a prior visit. Likely coincidence, not causation.
The Kindles are annoying, but a sub $35 alarm clock/ebook access device/backup web browser proves necessary sometimes.