[Stuckinsofa]

Yeps. And at Facebook-scale, when you realize the issue after it has went live you have already "stored hundreds of millions of user passwords"

[kerng]

That's a good point in favor of less hacking things together and more engineering - Facebooks seems to have not embraced strict engineering processes which are the only way to tackle these things. Facebook has to change it's own principles to succeed long term.

[EnFinlay]

I would say that this needs to change on a broader scale within the software development community than just with Facebook.