I find the professor's conclusions a bit clueless. He was essentially a griefer. He saw himself as someone who was persecuted by the community for following the rules. But in something as complex as a MMORPG, the rules laid down by the developers are less important than the gentleman's agreements established by the community.

In short, people had fun doing it their way. They didn't have fun doing it his way. If what he was doing had no impact on others, people probably wouldn't care. But he was spoiling the experience for everyone he interacted with.