Evolution in action?
<...The rock throwers have mainly been kids harrassing the Israeli troops and yes some of them have been inexcusably killed.
Actually, ref. the snow leopard, people routinely throwing rocks at men in tanks carrying automatic weapons may have something to say about evolution (not that this excuses shooting them dead deliberately). Even kids should be smarter than this, and when they're not, that's when the adults are supposed to step in and keep them from being eaten by snow leopards or shot by troops.
From Niven's Laws:
1a) Never throw shit at an armed man.
1b) Never stand next to someone who is throwing shit at an armed man.