It might be the beginning of an epic to be honest, if other EU countries in debt decide to default, or copy the effective IMF boycott by not paying back their debt obligations.
Austerity does not seem in a good sample of countries as it chokes their economic growth, taxing powers being weak aside. On the other hand there are still limited examples to prove that economic default can become a better option and choice for a country than retaining and protecting the banking system in the modern age, historically England and France default histories show that too many times in a row affects trust in the long run in regards to funding but defaulting once may not impact it as severly.
The case of Iceland illustrates one examples where banks were allowed to fail and economic growth followed, Greece could well be the second case if they decide to revert to the Drachma as they will still be able to secure trade with China, Russia and the EU who want to retain influence in Greece. I didn't including Zimbabwae in this sample as they decided to adopt a basket of currencies instead of retaining their own official currency which might be what the Greeks decide to do.
http://www.businessinsider.com/greece-is-looking-into-a-return-to-the-drachma-2015-6
http://www.telegraph.co.uk/finance/11673989/Syriza-Left-demands-Icelandic-default-as-Greek-defiance-stiffens.html
Taking your bank back might work a few documentarys such as the Money Masters use the example of the Greenback and the good old illuminati Central Bank, a financial system under the control of a sovereign owned public bank does have its perks.
Syriza sources say measures being drafted include capital controls and the establishment of a sovereign central bank able to stand behind a new financial system. While some form of dual currency might be possible in theory, such a structure would be incompatible with euro membership and would imply a rapid return to the drachma.