> can obviously much more complex than "fixing" an individual's behavior.

My favorite "hate" on the blameless post-mortem's is when it comes down to altering a process that someone owns, because then you're not only fighting for time-budget to fix and issue but you're potentially fighting what is, to them, part of their job and existence.

To get tangential, this is also why I hate big-A Agile, because if you have a person who's job is "do Agile," the scrum (master|lord|bag|dumpster), any changes, deviations, or complaints end up feeling like you're attacking that person's job. Never a fight you want to be in.