The description of security by obscurity in this article reads a lot like Kerckhoff's principle, which when employed correctly is actually a virtue. Not to defend cybercrime, but completely covering your tracks (digitally or otherwise) is a very tricky problem - one that people have long tried to solve with both malicious and benevolent intent - and failings in that vein aren't necessarily of the level of amateurishness that the term implies.
