If you mean by does Xbox live ever go offline. The answer is yes, if there is work which needs to be done, it may go down for a few hours. This is not common.
no
You have to wait until your Xbox Live Gold Membership time has expired and then take the details off offline.
Xbox live will be banned but all offline features will work normally but it will have an effect your xbox 360 may crash in the middle of games it did it on me
No. The kinect is offline and online play.
I'm not sure of the question but it does NOT require live and members of a Xbox can use offline game play if that's what you're asking.
No, Achievements can be earned online or offline. If you join xbox live with the same account, the achievements get transferred to the online account.
Gamer score updates it automatically when you be live on Xbox live
no
yes it can it does not just have xbox and ps3 live it also has offline single player.
Gamer score updates automatically when you log in to XBox live.
There are some advanced settings that you can change to force your online profile to not connect to live. Dig around in the parental options, or you can simply unplug your lan cord, or wi-fi adapter.
Yes, you are not required to have or use an MSN account in order to use an Xbox 360, either offline or using Xbox LIVE.