What terrorist mission?
You really think terrorists are going to spend all that time building a GPS guided UAV with enough explosives to do damage? Just because GPS is now cheap and widely available? Spending millions of dollars on weapons with all the latest gadgets to accurately hit targets is something the military do. If you're a terrorist, use the KISS principle - Keep It Simple Stupid - especially if you want it to be effective.
We live in a world where everyone over the age of 16 (or maybe it's 18 in Victoria, either way), is able to drive a vehicle with the stored chemical energy equivalent to two sticks of dynamite, while the sales of nitrate-based fertilizer is strictly controlled. So if I wanted to attack a target, which path would I go down? $1.30/litre and crash petrol filled cars in to my target! The fact that nobody is crashing petrol filled cars in to targets probably means there isn't anyone out there who wants to do it?
The fact that we're misdirecting millions of dollars on "security" which really does nothing but make people "feel" safe is just plain dumb. I mean seriously, take out every laptop and scan it separately to see if the battery has been replaced with cemtex, but leave the laptop power supply which could just as easily be stuffed with cemtex in the bag with all your other crap? Don't bother scanning cd players, mobile phones, ipods, separately, even though they're just as capable of being stuffed full of Cemtex? Ask people to turn their laptop on to prove it if there's any doubt. You gotta be joking right? Lets try blowing something up here in a terminal filled with 10,000 people as opposed to letting it through with only 100 on an Ejet out over the Great Australian F*** All)?
The whole idea is about as bright as no electronic devices during take off or landing as it may interfere with aircraft navigation devices? You expect me to believe that !!!!? My iPod is going to bring down a 737 if I listen to music on takeoff? Doubt it. Is it really that hard to tell people the truth? "Personal Entertainment Devices may distract you from listening to our instructions in an emergency should we need to evacuate the aircraft, the chances of an evacuation are significantly higher near the ground than at 37,000' so we ask you to turn that !!!! off until we're in the cruise"
The terrorists won along time ago, they don't have to do anything now. Fear, Uncertainty, Doubt has taken over and people are too stupid to realise and see the big picture.