On the subject of "scary-story-but-nothing-to-worry-about," here are a couple from me:
* Osama bin Laden might recruit suicide bombers who fill their colons with Semtex and undetectable shards of broken glass. These anus-bombers might blow up airplanes with their explosive assholes, killing everyone on board. We should all get a thorough, deep rectal exam prior to boarding, starting right now.
* Terrorists might use rigged laptop batteries to trigger massive inflight lithium explosions. All laptops should henceforth travel in unpadded, unlocked bags. No battery-powered devices of any kind (digital watches, hearing aids, iPods, phones) should ever be allowed on airplanes. People with pacemakers should walk. Or stay put.
* Terrorists might start animal shelters and use them to recruit stray animals that can be trained to serve as superbug vectors, tearing through our cities, spreading weaponized Ebola. No living creatures -- other than (some) humans should be allowed within the city limits of any settlement bigger than 400 people.
* Terrorists could infiltrate the world's car companies and manufacture large, fuel-inefficient vehicles like Hummers. Once America has gone all SUV, the resulting carbon emissions would contribute to polar melting and global warming, causing devastating hurricanes through the southwest, killing and displacing millions of Americans. Ban car companies now, or the terrorists have won.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.