Rage Quit: To stop, cease, or discontinue an activity due to aggravation from being constantly pawned.
That's one of the many definitions of "rage quit" available on the inter-webs. Finding examples of "rage quit" is easy. Whoever, studies about "why" rage quit occurs are not that many.
From my own experience in multiple gaming forums, I believe that the rage-quitter's goal is become a martyr in an attempt to rally the troops. The video below would be a perfect example of such strategy successfully achieving that goal:
Youtube linky (embedding was dissabled): Sheldon Paintball Scene
That kind of success rarely happens in real life tho.