Well, my thought is that if they don't want planes crashing into buildings, a remotely controlled destruct option would be rational. Not that it is necessary as things now stand. Can terrorists blow open the cockpit door if not allowed to take the necessary explosive on board? And that's the sense of screening at the airport. Ideally there'd be no carryons at all. Actually, I think the government should ban carryons and also ban charges for checked luggage. They can do both, and the two bans make sense together. Let the airlines stop playing shell games and just charge what they want to make on the ticket itself. And then have a LIMIT on checked luggage. Though I guess they could take bags over the limit as a freight business. But making carryons free and putting fees on checked luggage favors the thing security wants least, namely, lots of carryons. Which then insures that security screening has more work to do to prevent terrorist tools from entering the plane.