[rkomar]

Yes, and if a battery catches fire in the cabin, there are people there to do something about it. If the luggage starts burning in the hold, too bad.

In Canadian airports, I have had some electronics checked for traces of explosives. Apparently if you take your nitroglycerin heart pills in your fingers and then type on the keyboard, they can pick that up. It sounds like they've thought carefully about their policy, and I'll be surprised if they change it in the next while.