Thanks. Another thought on the paint projectiles. The American military in Iraq could round up everyone color-coded for questioning who is seen cheering after an IAD explosion. They may know something, or even participated. Plus, just keeping someone in lockup for say 2-3 weeks is enough of a deterrent to let kids know that such cheering will cost them rather than letting them mug for free before Al Jazeerah.
Ref #212.
I continue liking your ideas.