Earlier quoted context omitted.
Whoa. Good point. Shit just got real. Thanks for creeping me out even further.
The risk has always been there. Have you ever seen/used a lock-pick gun? They'll open anything non-specialized in less than a second. Failing that, a lightly skilled (50h practice) lock-picker can open most household locks, even "secure" ones, in under fifteen minutes. Beyond that, the lock/deadbolt/wall is pretty weak. A sledge hammer will open almost any door in a single blow. Windows are essentially just big gapin…
Authorized entry is, and in the case of AirBnB you've got a case where someone's contracted for entry, may have notified neighbors / building management that strangers will be present, etc. (though "hey, strangers will be present, would you mind looking in on things might have been another good practice for EJ).
Your points on locks are very well made, and there's a long Internet (and pre-Internet) history of attempts at censorship by lockmakers against picking methods.
Phone books? How archaic. I don't have a landline -> no phone book entry. My information might be accessible elsewhere, but my perimeter security systems are quite good, and Krell steel resists mosts assaults.
Your idea of "unethical" (to say the least of good business sense) is markedly different from mine.