If it looks like confiscation is nearing, bury most of them in sealed PVC tubes; also bury a sh*t-ton of metal cans scattered in the yard and woods. (Good luck, with a metal detector).
Then file a police report about stolen guns.
Then, if you want to rub their noses in it, go to Kinko’s and print out about 10,000 copies of the manual that tells you how to build a fully-automatic Sten gun, and give a free copy to every “gangsta” on a street corner. (admittedly this is irresponsible, but a sudden surge in Sten gun drive-bys would make a point)
If the latter seems harsh, consider what Jeff Cooper said in 1994 to “Guns and Ammo” magazine:
“no more than five to ten people in a hundred who die by gunfire in Los Angeles are any loss to society. These people fight small wars amongst themselves. It would seem a valid social service to keep them well-supplied with ammunition.”
If you have to bury them you better be using them.
Here’s what happens when you just hide them.
http://gunwatch.blogspot.com/2013/01/30-shotguns-and-pistols-ammunition.html