> I guess Blameless Postmortems haven't arrived in journalism yet.

Not anymore. Back in the day of print newspapers, a dozen people read an article before it was printed, including editorial staff, fact checkers, legal review, layouting and printers. If something slipped through – which was much rarer at the time – they'd also print a retraction.

Most of that stopped when newspapers and the blogosphere basically merged into one ad-funded business.