I think acronyms are fine for teaching beginners, but after the initial learning period does anybody actually stop while building each anchor and walk themselves through RENE? I doubt more than a tiny percent of the most anal individuals among us do that.
Assuming whoever built that anchor wouldn't have made that mistake if he had been taught RENE, for one thing, assumes that he hadn't been taught RENE. We have no idea if that's the case in this situation. It could easily be that the anchor builder was experienced, and just somehow did something incomprehensible. Or he could be inexperience and screwed up despite having been taught RENE. Or something else equally baffling happened.
For my part anyway, I just get offended by the idea that oversight and/or rigid guidelines and methods of teaching need to be applied to all just because of one extraordinarily uncommon occurrence. Especially considering we don't even know what happened in this case.
edit for grammar