One of the problems with best practices is that they are created by a group of experts to be used in all circumstances, without thinking.
"Just follow the instructions."
A typical example of this is when people follow the instructions of their GPS system and drive their car into a historical village center, a pedestrian walk way, …
Each time with the excuse : "I just followed the instructions."
I wanted to make a post about Best Practices, but the guys at xkcd did a far better job … enjoy