Should we trust every player of our community when we daily have them rule breaking, scamming and giving out false reports ? I guess the answer is clear.
This does not mean that it is not possible for someone to take tests outside CMB, however it does need a high level of trust. After all the admins who gives passport should truat that the test was taken, that those who failed will not take advantage of a lower level test and that the passport is not being 'sold' .