The goal of Canada's half-billion dollar gun registry is public safety. By requiring gun owners to provide references and submit to a detailed background check, the logic goes, potential criminals will be weeded out. Toward that aim, the Firearms Act requires every gun owner to fill out a personal questionnaire: Have you ever been depressed? Do you have a drinking problem? How about an emotional problem? Have you ever been reported to a social services agency for a... (GunPolicy.org)