Your analogy misses some key details. It is much less absurd if I am storing valuable items and documents for everyone in the neighborhood while publicly proclaiming my house is more secure than a bank vault. Meanwhile I can't even be fucked to lock the door when I'm away.

I'd say you checking the front door to find it unlocked, then taking a few pictures for proof is perfectly moral. In this case, I think most people would agree it is a step too far to expect you to come to me first, rather than immediately announcing to the entire neighborhood that I'm being incredibly lazy and reckless with their valuables (on top of outright lying to all of them).