I think these are one of those things, where in a micro sense, is a good idea. However you'd be opening things up by setting such a precedent... one day it will be you an me in the interment camp.
You know, some of those gun lovers must have a violent streak, let's cage 'em all up and sort them out.
You know, Mexicans are always making trouble in this here neighbourhood. Let's round 'em up.
You know, we don't want to lose our bretheren to more of these Heavens Gate kind of cults. Let's set up a list of acceptable religions, and round up all those not on that list or deviate from a Official religion.
You know, it can be statistically shown that postal workers (or whatever) are more likely to come to work and shoot up their officemates, let's not allow any of them to own firearms.
This scares me.