I'm sorry about your friend. Getting shot would suck to an unimaginable degree. Thinking about the constitutional issue, the second amendment says, "A well regulated militia being necessary to the security of a free state, the right of the people to keep and bear arms shall not be infringed."
-- As I ponder this one, I wonder --
Since the militia are the people, perhaps, EVERY draft eligible male (or everyone) to take a gun safety course as part of selective service eligibility or public schooling. This would maintain the populace as a "well regulated militia" without infringing on the right of the individual to keep and bear arms.
In the meantime, people would do well to keep the four fundamental rules of gun safety