I assume he's trying to say that even though the law says they can't search your personal safe, they may still search anyway and jail you if they don't like what they see, or take you to jail simply for refusing to open the personal safe. Of course, you could probably sue for wrongful arrest, but who knows how much damage will have been done to your business in the meantime, since I imagine that any arrest during an ATF investigation would result in the confiscation of all your guns, which would most likely take several months if not years to get them back and get your record cleared up.