United has now reversed its former policy (the policy that had been announced last month) with regard to passenger-owned noise cancellation headsets.

From now on, passengers are not allowed to operate their own personal noise cancellation headsets during taxi, the first 10 minutes of flight and descent.  The April 2004 revision to the FAOM will be updated to reflect this policy change.

What they need to come up with is a Knee Defender Idiot cancellation device!