Rick's mod of my message is fine and accepted for the emotive language.
The question really is to the instructors / dive leaders and on the highlight from Rick about the second issue in this thread - how many actually will stop a student mid-instruction, refund their money and suggest that it would be unsafe for them to continue instructing the student should they continue with their lack of appreciation for the seriousness to themselves (and more importantly future dive partners) of their actions !!!
do you continue to instruct someone who "willfully disregards instructions"
maybe this question should go to the professionals forum ?