Should Personal Electronic Devices be Banned on the Flight Deck

This question was recently asked on a travel website that I regularly follow. It's being asked in light of the recent Northwest Airlines pilots missing their mark by 150 miles. Their explanation was that they were on their laptops looking over new company information and were distracted. Here's my 0.02 us dollars.

There are laws and regulations already on the books so this legislation would be pointless. The problem is not that electronics are being used on the flight deck, but at what time they are being used. During critical phases of flight is not a good idea. However, if there's a long flight and the autopilot is on, it wouldn't appear to be a problem. Pilots are reading magazines and other things during that time. What's more scary is when the pilots are listening to their mp3 players and not able to hear any audible alarms. Many senior pilots are finding that when they look over at their younger colleagues, they have their ears covered and their favorite music going. This has even happened during sterile cockpit conditions ie. take off and landing phases of flight. If the Northwest pilots would have fessed up and told what is more likely the truth in that they were probably sleeping, none of this would be discussed now.

What do you think?