From The Australian December 30, 2008 by Abraham Rabinovich, Jerusalem:
RESIDENTS at certain addresses in the Gaza Strip have been receiving unusual phone calls since the Israeli air assault began on Saturday -- a request that they and their families leave their homes as soon as possible for their own safety. More unusual than the recorded message is the Arabic-speaking caller, who identifies himself as being from the Israeli defence forces.
Dipping into their bag of tricks for the updated Gaza telephone numbers, Israel's intelligence services are warning Palestinian civilians in Gaza living close to Hamas facilities that they may be hurt unless they distance themselves from those targets.
In some cases, the warning comes not by telephone but from leaflets dropped from aircraft on selected districts. Such warnings clearly eliminate the element of surprise, butfor Israel it is of cardinal importance to minimise civilian casualties, and not just for humanitarian reasons.
The principal calculation is fear that a stray bomb hitting a school or any collection of innocent civilians could bring down the wrath of the international community on Israel, as has happened more than once in the past, and force it to halt its campaign before it has achieved its objectives.
Israel Radio reported that leaflets had been dropped at the beginning of the operation in the Rafah area near the border with Egypt, warning residents that the tunnels to Egypt through which weapons and civilian products were smuggled would be bombed.
Many of the residents, mostly youths, are employed in the tunnels. Initial reports said two people were killed when the tunnels were bombed.
Gaza is one of the most densely built-up areas in the world, making it extremely difficult to pinpoint targets without collateral damage. Israeli officials say that the small percentage of civilians killed so far is due to precise intelligence regarding the location of Hamas targets and accurate bombing and rocketing.
...Israeli Foreign Minister Tzipi Livni, meeting with foreign diplomats in Jerusalem yesterday, said she understood the difficulty for them to express understanding for an armed attack.
"But this is the only way to change realities on the ground," she said. This is what is needed to change the situation."