Nerf N-Strike and QoS, Wii games that have HUGE legs?

[Gnizmo]

--OkeyDokey-- said:

That's all well and good, but COD doesn't strike me as a game you'd play with your family...
Besides, it totally ruins the fun being able to see what your enemy sees. Not to mention being limited to four players and a fraction of the screen.

 So why not have both? What does the option of splitscreen take away from the game if there is also online?