When they kick you out, you can complain that they wrote the 'kick you out' rules after you joined.
I'm sure the Germans and Finns will be very sympathetic.
There are also no 'leave the euro' rules. As the law stands you are all stuck with it. But he who has the gold makes the rules. You're fucked.
Your government loans are at below market interest. Because the lenders know the rest of the euro zone is (sort of) guaranteeing your debt. Greece is not credit worthy on its own.
The only thing that has protected you so far is the others that will be knocked down when you default. But they are getting their shit together. Once Iceland, Italy and Spain can take the shock of Greece falling on it's face, Greece will allowed to fall.