''Own up now if you have a gun'', schools in Gurgaon have asked parents for disclosures of their weapons after 2 class 8 students shot dead a classmate last month but many are questioning if this will indeed prevent such tragedies. According to the Haryana police, schools have been given a one-page form for parents to fill with details of guns they own. But going public with that information could lead to even more trouble, say some principals.