Pleading incompetence

I've heard about pleading ignorance, but pleading incompetence, and actually getting away with it? Seriously? The Swedish Security Service has unclear rules on how to treat surveillance material (isn't that the main part of their job?), and to add insult to injury the employees are so incompetent that they can't be held responsible for their actions:

Lind pekar ut oklara beslutsordningar samt brister i interna regler och kompetens på Säpo, men han bedömer att inga tjänstefel begåtts.

Juristens Funderingar has a few more thoughts on the subject.