7. Yes "ordinary consumers" stop paying debts all the time, no big deal.
No big deal other than the fact when they need another loan whatever the lender wants a higher yield to reflect the risk.
In the case of Greece which has a poor payment record they have to chose between the bond market and paying a high interest rates with no conditions attached or funds from the ECB at much lower rates but with conditions attached.
It is their however their choice to make.
I was originally foreseen that Greece would make November at best before the final calamity. Their now seems to be postponements in hand simply to protect the possible affect on US elections from the inevitable worldwide financial fallout. Fat of of good that does the population of Greece.