No-one needs arms like that. As with certain types of weapons, you've established that an individual must prove a need rather than claim a right. If politicians, police whatever searched my house - I would be very obstreperous about it. Another poster mentioned freedom of information being right 'up there' with freedom to posess human killing technology. I agree with this.
Freedom of information is incredibly liberating and empowering.
If the above scenario happened - i would grab my digital camera, and document, document, document. They would simply take your camera. You show that you would object to the search but not that you have any need to not be searched. THere was a massacre here - which prompted the new laws. It was revolting.