I would say, they will be fighting a real battle if they try.
Firstly, more US Citizens are starting to realise that their governments are crooks and the continued bills being passed through the congress and senate without any opportunity for the average person to stand up against it, shows that there is a massive difference regarding patriotism now compared to the 1930's. They have seen how the bankers have gotten away with fleecing millions of peoples savings as well as the stupidity of QE by the FED.
Admittedly, there are many US glued to the mainstream media that are about as sharp as a bowling ball. However, that is much the same here.
Yet, the real positive is that more people are starting to wake up and follow the internet for news rather than mainstream. In the Youtube section here, someone posted an interesting interview Infomercial for Casey Research. It had Casey - Peter Shiff - Mike Maloney and a few others. It was looking at the political and legal aspect of diversifying your hard assets outside the US by taking up dual citizenship and diverting the assets legally. Well worth watching. Could apply a similar situation here before they change the laws.
!) People are showing they distrust governments
2) How could governments force people to give up their Gold or Silver?
Silver trading would open up a new black market for all the industrial Silver that is required.
As far as Gold is concerned, many new jewellers and goldsmiths would suddenly appear.
Bigger and deeper holes in your backyard.
I do not see it happening here in the same way as the US is heading.
What I do think will happen is a race to see which country will be the first to adopt a Gold Standard backed currency.
Whichever happens, it is going to be mess.