Dungeon Mastery: Being Tsundere should be seen as a kind of (Inter)national Epidemic

What is Tsundere?
Tsundere is a Japanese term for a character development process that describes a person who is initially cold before gradually showing a warmer, friendlier side over time. The word is derived from the terms tsun tsun, meaning to turn away in disgust or anger and dere dere meaning to become 'lovey dovey'. -Wikipedia

Its Relevance to Dungeons & Dragons
You will find that all Players and Dungeon Masters fall into this category. There is some damage that poisons humanity and those seeking refuge in Dungeons & Dragons seem hardest hit, perhaps because they are no more than a population sample. 
Dungeons & Dragons isnt just a game, its a shared experience where over time, players and Dungeon Masters grow just like their Characters and game-play Skills. Gygax and Co. have inadvertently staved off a significant spread of that epidemic with a globally accessible game that encouraged personal growth and human interaction. Beyond the game about killing people and taking their stuff it dragged kids out of their shells.
Where the Internet has given people the ability to hide in their room and communicate through a series of hostile acts escalating rapidly toward the failure of Civilization, Dungeons & Dragons was, oddly enough, the Panacea.