I in no way see how RBark is a troll. If getting worked up and rude during a debate is trolling than we are a forum made up of a majority of trolls, because most if us have done it at one time or another. I also fail to see where RBark didn't support her arguments. Actually, many posters were amazing patient, considering that the same concept was being explained multiple times by multiple people and was still not seeming to be grasped.
I will say that I was someone who would have been for mandatory certification before whose mind has been changed by this thread--a lot of good points were brought up that I would not have considered before...