How many reports of overheating lithium laptop batteries must we hear before airport security agents start cracking down on my Dell Inspiron or your Apple MacBook? Sure, the damage intended by terrorists from a seemingly innocuous-looking bottle of liquid would be terrible. But today's reports of overheating -- and in some cases, spontaneously combusting -- laptop batteries brought the considerable specter of an exploding laptop at 30,000 feet.

"Most of the incidents reported to the CPSC occurred around the home, but transportation-safety officials have become increasingly concerned about the threat of a laptop causing a catastrophic fire aboard a commercial jetliner," said the AP version of the report. The New York Times article brought up a fire in the overhead bin of a Lufthansa jet while on the runway in Chicago (no one has confirmed whether or not this battery was housed in a Dell laptop).

With Apple recalling MacBooks because of overheating in June, I have to wonder: how is it that shampoo is verboten, but a potentially flammable laptop can proceed on the plane, to huddle on the floor with all the other laptops, cell phones, Blackberries and illiquid snacks? Investors' minds clearly weren't going where mine is, with Dell down 1.41% in after-hours trading, Apple up a bit, and after-hours quotes unavailable for American Airlines and Delta.