Oh! I didn't know it was actually against the game's code of conduct to ram like this. In that case, ramming is breaking a rule, and the offender should be reported and punished. What is the punishment for ramming like this, anyway? Is this win taken away from them?

If the developers don't want players to ram each other, that rule should be enforced by the game itself. Either don't have realistic collisions between players, or prevent cars from going offroad after a collision, or instantly take away the offender's money or points.

Fighting game tournaments usually allow everything that's possible in the game engine, but there are exceptions like intentionally crashing the game.