I'm downvoting you for saying I think it's a stretch to call this a mistake
If it wasn't on purpose, it was a mistake. Period.
It might be inexcusable, as you later pointed out, but it was still unintentional. Everyone likes to hate on Facebook. If this was a YC startup, I suspect people would be more forgiving.
That's true, if it was a group of three young people starting a new business, I would be more forgiving than about a multi billion dollar corporation with hundreds of engineers and millions in resources.
It was a mistake, but another word for a mistake is 'negligence'. The fact that something like this can happen illustrates systemic shortcomings at the company. Millions of people are depending on them to enforce the privacy restrictions Facebook claims to enforce. Facebook encourages you to store highly personal data, and as such, they have a responsibility to be more careful. Facebook prides themselves on constantly pushing changes to their software. More safeguards, testing, and perhaps slowing down the software development cycle a little would not be a bad idea.
Fair enough, I mean to say 'what you may call a mistake, I call negligence'. A pattern of making gross errors adds up to negligence... or incompetence.
I think the problem is that calling it a mistake downplays the issue. I'd say this is grave negligence, because besides the feature itself, it shows a lack of access control systems.
> If this was a YC startup, I suspect people would be more forgiving.
Evidence to the contrary: the Dropbox security fiasco (which sounded worse but was resolved in hours with claims of no malicious activity) prompted several HN entries. HNers aren't so biased as to be blind to inexcusable negligence (esp. because a large majority of us are users of those services and have personal stake.)
Facebook has a history of such "mistakes", a founder who thinks FB users are "dumb fucks" (and has reportedly maliciously used FB's password log), and all the motive in the world to be "negligent" as it's a way they can make money (as long as we don't find out).
The foolish thing to do is to assume this is still a mistake after repeated history of such "mistakes".
aammm... you omited the word 'just' which archio stressed.
Sure, if you take away THE important word of a sentence, then you might as well downvote it.
'a mistake' puts this at the same level of seriousness as other problems. This is at least a big mistake.
If it wasn't on purpose, it was a mistake. Period.
It might be inexcusable, as you later pointed out, but it was still unintentional. Everyone likes to hate on Facebook. If this was a YC startup, I suspect people would be more forgiving.