That is an interesting idea I had not considered. I've never been willing to loan owned/liberated ebook files, it was a judgment call, but somehow it felt like going too far over the line beyond the typical TOS with the seller. This is a pretty good idea just loaning the whole device, I assume the premise being the ebook is tied to the physical device and won't be used elsewhere. But for those who cloud sync as I do, what's to stop them from just simultaneously reading the device on a phone or whatever, while loaning say their Kindle to somebody else? Seems like maybe this could still get iffy, I don't know. Maybe not a problem. I've never tried it.