How difficult would it be to plan such an act? Choose a Saturday for maximum news coverage; RPGs, small arms, readily available; a few major roads ~ with flat horizons making it easy to spot a convoy of SUVs far off with the aid of simple binoculars and a rooftop.
Anyone could choose to use a weapon against another, yet they don't.
As for the 'rent a "Lord of the Flies" boys', who perform their gruesome and provocative acts for the waiting cameras, I wouldn't be surprised if Saddam focus group tested the reaction of the public to such acts over the years using the Iraqi Info Ministry.
Do the elite, anti-war, socialist / terrorist appeasers ~ Hillary, Kofi, Chirac ~ consider it a hate crime, I wonder, to fill a child's mind with lies, harden his heart with hate, and turn him into a killer?