FAR more puzzling than the oath to bury weapons to prevent confiscation is the assumption that "They're gone/stolen/sold" will EVER fly when they come calling.
To anyone seriously contemplating this "plan," do you really think the thugs will then just shrug and move on? Like they never thought of that?
You don't think they will have given ANY thought to the notion that EVERYONE will try this approach? You don't think maybe they'll demand reciepts or other documentation?
Let's play "confiscation," I'll play the gov't guy.
"We're her for your guns, hand them over."
You-"I lost/sold them and/or the rest were stolen. Well, guess you'll be leavin'."
"Show me reciepts and/or a police report or turn around so I can cuff you. Posession of firearms is a crime. If you have reciepts, the weapon had better be where you say it is. If you have no proof that the weapon is not here, this is a warrant which permits us to search your home, car, real estate and place of business. Even if we don't find weapons, it will be presumed that you are hiding them in violation of the Feinstein Take Back Amerika Act if you cannot prove you are no longer in posession of the contraband."
Try a little reality on for size.