Exactly, but when you fire mass amounts of AAA over a city, you're bound to have misfires. These misfires can have different effects, like duds that usually won't harm anyone unless tampered with (on the ground), and low altitude bursts.
Also, a 9mm round fired into the air can kill a person on its �return trip�. Imagine the impact of AAA shrapnel on its �return trip�.

My question wasn�t about the lethality of AAA to civilians on the ground, it was a question of how many Iraqi civilians it has killed in the last few weeks.