Plutonium

In the future they will add the campaign mode of Black Ops 2? I would be very grateful if you could include the campaign mode in BO2 (and maybe others more) since Plutonium would technically be a complete BO2 and free for all.

Does this BO2 and MW3 client have protection against this type of attack - exploit? I would like to make sure nothing bad gets into my PC Thank you!

(Sorry for my bad english)