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 hundr

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.