Marvel vs. Capcom 3 uses an invisible rep system for players so those quitting unfairly will find themselves facing other like minded souls of ill repute.
It aims to encourage players to stick it out and take your beating like a man with plenty of chest hair, and not throw a tantrum and deny your opponent a well earned victory at your expense. If you can't learn this lesson then expect your wins to be soiled too.
Frankly this form of anti-bastard control should be used for most multiplayer enabled games around the world from now on and even patched into others! Marvel vs. Capcom 3: Fate of Two Worlds releases on Xbox 360 and PS3 February 15th.