That's because nobody has said they are going to come take guns. But that's not what I said. I said they want to. It's not all anti-gunners (a small minority of them, I'd guess). A handful of politicos who, given the opportunity, would be completely in favor of taking guns away from all law abiding citizens.
I have said before (probably in this sprawling thread) that I think gun confiscation is unlikely, primarily because it would be prohibitively expensive and a logistical nightmare. But, if the day came that the idea somehow gained enough traction to be executed, where would be the logical place to start? Wherever there's a paper trail. And as long as the possibility exists, however remote, it is a legitimate concern.