If you see a message saying that your 'Account has been permanently banned...' then yes otherwise no.
BTW - unless you're cheating -- why would that even occur to you???
its not true, i have been banned; and i know why, zombie mode with 3 other players, one of this players activated an cheat with impact to all players (unlimited money, fast reload)
after less then one minute game has crashed, next day i faced with perm ban
customer support explaind me:
Es passiert leider immer wieder, dass Spieler auf gehackte Server geraten, jedoch können wir nichts an den Spätfolgen ändern.
Translated english version:
Unfortunately, it happens again and again that players get hacked on server, but we can not change the long-term consequences.
What does anything that you've said have anything to do with the OP's question? Simple if you're permanently banned then you see the message 'Account has been permanently banned...' I posted above - period. So don't do any of the following and you have nothing to worry about; only reasons you get banned ->http://community.callofduty.com/message/413500949
In your case don't play with Cheaters, pff I don't...and what they do has no impact on you unless you cheated.