In today's Haaretz (Hebrew edition only), Assaf Ronel criticizes the Israeli hackers who published the credit card details of innocent Saudi civilians in retaliation for a Saudi hacker revealing innocent Israelis' credit card information. He also argues that Israeli police should investigate the Israeli hackers.
Ronel is absolutely right. Responding to criminal acts with criminal acts of our own should not be our way. The police should arrest and prosecute those who hacked into Saudi websites and stole credit card numbers.
There is a lot of idiocy in this whole affair. Calling hacking Cyberterrorism, as our genius Deputy Foreign Minister Danny Ayalon has, is just stupid. It's a nuisance, a crime and might cost credit card companies money, but it isn't terrorism. You don't fear for your life, and there are very easy ways to avoid falling prey to hackers (like using PayPal, for instance, or only very trustworthy Israeli websites). So chill, Ayalon.