Well, you may not be worried, but some folks wake up screaming because the paranoids are out to get them. Imagine that some raghead wannabe martyrbot could be programmed to fly a model airplane (it's a stretch, but consider the probability of a random billion monkeys writing Shakespeare), sans the unnecessary landing procedure, could do with a payload of 2 Kg of M-80's. Strategically targeted, there could be a fallout of hundreds of kilos of pigeon crap.

Abel