They are either ignorant or didn't mentioned on purpose. Patriot Act. Making impossible things - possible, after all we are all terrorist at heart To put it simple: Gov turn around and say that (for example) Sprott fund is somehow helping terrorist activity and organizations, and therefore all their goods are seized. Nearly endless possibilities
IMO it's very unlikely in Australia - our Goverment can't put fear into the international investors who would buy PM's from us by Confiscation it's own citizens... Australian,South Africa,Canada etc are countries which all would benifit - why would they kill the market?