Fair enough. But since you're an ardent fan of PADI standards, it's worth noting that PADI has standards of conduct for their members. I'm assuming that your DM is with PADI.
First, I am not a fan of PADI, or any standards in particular. Second, I may or may not be a divemaster or divemaster candidate, and if I am it may or may not be through PADI. I have read through their standards though and I do not see one that discusses being cordial on an internet forum. I am not here representing PADI or any other organization for that matter. Your insinuation is off base and out of line.
Sorry you don't agree with the sentiment I have posted or the way I have expressed it...that one should reach out to PADI to obtain clear guidance on what acceptably meets their standard for a CPR class, instead of asking a bunch of internet personalities.
-Z