Kilgore Trout
Misanthropic Humanist
Maybe, I guess. But that would mean you'd have to put the item in there and never open the box again. This would mean you'd have to have a separate safety deposit box for each article/paper/idea/etc. That could get expensive quickly.
Yes, but this would be a small price to pay for protecting the discovery of a grand unification theory which would revolutionize our understanding of the universe, and ultimately result in practical applications we couldn't even begin to fathom at this point.