My younger brother pulled one of the most bone-headed stunts I'd seen in a long time...attempting to fly home from South Carolina with a duffle full of firecrackers, bottle rockets and other fireworks not generally available for sale in Florida (actually, they are available - you just have to know how to ask for them. But I digress.)
When I say full, I mean FULL. He very nearly missed his flight ... if he hadn't been at the airport almost 3 hours early, he would have. It's always been illegal to carry fireworks on planes, of course, but they rarely caught people before all the new technology took effect.