People breaking into one of my many unused houses? I'd say it's a nice problem to have.
Coming to it in the spring and finding that some kids decided to have a party in there and almost burned it down wasn't exactly a nice feeling. I certainly hope that it doesn't happen to anyone else, including mr Bezos, however much you may disagree with his business practices.
There's a deep sense of personal violation that comes from having one's house broken into; while that is probably lesser for people with more than one house, it's still wrong. Most people who support this sort of thing wouldn't loan their houses out for parties, I notice; if one wouldn't lone out his own house, why might he think it better to loan out Mr. Bezos'?