http://www.ynetnews.com/articles//0,7340,L-3052074,00.html
A security official tells Ynet there are specific criteria for deciding the level of a soldier's security clearance.
"One of the tests we do, either by asking soldiers directly or through information provided us, is to ask whether they take part in the game," he says. "If a soldier answers in the affirmative, he is sent to a professional for an evaluation, usually a psychologist."