How can we separate the management contenders from the management pretenders?

Regarding professional designations – the Project Management Professional, (PMP) is a designation issued by the Project Management Institute (PMI) to individuals for demonstrating mastery of the Project Management Body of Knowledge (PMBoK). It requires the knowledge to understand why we manage projects, training to understand how we manage projects and practice to understand when we manage projects. Once certified, the PMP is capable of interpreting and applying the PMBoK to any project management situation. This put the PMP in high demand. An industry has emerged to help people take a short cut and earn this designation by coaching and memorizing questions of the exam. As a result, more and more individuals with the PMP designation have no idea what is actually in the PMBoK. How can we separate the management contenders from the management pretenders?