Would you agree that nukes run afoul of that reasoning?
I can't think of any obvious examples of other materials that would be reasonable to restrict in the same way as fissile materials though. Those are kind of a special case where there aren't many uses for the material (power and bombs are basically the only uses I'm aware of for enriched uranium), and it's hard enough to obtain that trying to restrict it isn't entirely useless (unlike phosphorous, which you can buy in the grocery store in any box of matches). Chemical weapons I suppose.
Since it's an important example, I don't think it's a bad faith argument, but also note that an argument that restrictions on simple possession of one material without any proof of intent to use it for harm are justified doesn't mean that all such restrictions are justified. I think gp was arguing the "sometimes justified" case, not the "always justified" one.
Nope. I chose nukes because they were an obvious example of something that we didn't want just anyone to have within arms' reach. I didn't expect it to be subjected to the kind of criticism you're raising.
Man that's gonna surprise all the legal gun owners in Canada, the UK, Sweden, and so on.
[0]http://hrlibrary.umn.edu/research/Somalia-Constitution2012.p...
You touch on an good point: enforcement.
So far in human history people have been mostly tolerant of laws that were incompatible with their way of life because resources available for enforcement has been the bottleneck and most laws go unenforced unless people really want them enforced. For example, anyone who wanted alcohol during prohibition could get it, it was just a little more expensive and lower quality. Sure alcohol was illegal but it wasn't considered immoral by most so you only had to hide your use of it from law enforcement, not from society in general. We seem to be entering an age (at least in the west) where thanks to technology the bottleneck is politicians and police willingness to face backlash from the public. I'm not going to speculate on what the future holds but I fear that it will not be good if people grow accustomed to the government ratcheting up enforcement of laws that are on the books but currently rarely used.
Off the top of my head, the only nation that I know explicitly bans private ownership of firearms is North Korea.