Hooked: How To Make Habit-Forming Products, And When To Stop Flapping We now know that Vietnamese developer Dong Nguyen decided to take down his hugely popular—and habit-forming—game, Flappy Bird because he had a moral pang about the game’s addictive potential. There was speculation about legal problems, or coping with the stress of overnight success, but it seems that he has done what many large tech companies have avoided—taken responsibility for the misuse of his product. Tweeting as @dongatory a a couple of weeks ago,…