A. The short answer is no. It is an integral part of the SQL system and cannot be turned off.

Certain operations are "non-logged" like fast-BCP and select into. This means they do not log record updates. However they DO log extent allocations. They need to do this so that if the process is terminated unexpectedly (maybe the power goes out), SQL can recover the space. This greatly reduced logging can result in better performance - but as it makes the database non-recoverable from transaction-logs should be used with caution.