Regarding these confiscations, I remember reading that since the law went into effect (I think a year or more ago) it had been used state-wide like 300 times, which the news seemed to think was super low. Basically the police either didn't use it as a tool, or didnt know it was a tool they could use. They even had a shooter with mental issues and were asked why didnt you confiscate his guns when you visited his house and determined he was a nut, and they didnt have an answer.
It's tough for me, I mean if some guy is pledging jihad or talking about shooting up a school, hell yeah I'm ok with the cops taking his guns, but that line gets blurred quickly, and when do I, just a guy who owns some guns and ammo and like to shoot and hunt, start to sound like someone who should lose his rights.
i agree with the above, there are those who talk about "a mess when the cops come", frankly, thats BS tough talk. The police are basically a domestic military these days and quite adept at squelching singular threats. The only time people have success against them is in large groups, since killing several citizens is harder for the media to stomach, and like Silentstalkr said, you cant rally that kind of support immediately.
If they want your guns, they will get them, and anything you try to do to slow/stop that will (in their eyes) validate whatever action they choose to take.