Lol no. You can get hopped at any time, even when you're not online. Hackers have the codes FOR EVERYONE. Read this. EVERYONE. It doesn't matter if you only play survival, because the server still recognizes you by some form of ID(also, in normal multiplayer, you're still in the leaderboard, as a level 1 with 000 everything...). So as long as you are connected to any MW3 server, you are at risk of getting hacked. Actually, even if you have any slight connection to a hacker whatsoever.....you're getting hacked eventually.

eh idk i have all these codes and heres exactly how the account hopper works.u send the person a ally request. then have another already sent so u have two pending proposals then u go to the second one and hit ur home button on ur wiimote.(ur hopping on the first proposal)then u sign out onto another account which will replace there name once ur signed on. then just hit home at the please wait screen and u can see all there messages and allies.