This won`t kill the banks,because they will get financial support from the central banks.By "financial support" i mean loans with little or no interest.Actually "killing" the banks is not a good idea,because many people have savings in those banks.The only way to kill a bank is to create financial panic and find a way to force the people ,who have deposits to withdraw their money.
Getting loans and not paying your debts will create more problems for you.The banks will chase you ,untill you pay your debts.
Yes, good idea to make bank crisis are making financial panic, such as database bank was being hacked and money stolen hahaha, this could be effect most on their customer will withdraw their money at same time, it's panic situation, same as we called here panic selling
I will not recommended taking loan from bank, even it is just Credit-Card, because they are running it under the regulation of law so they can take you into legal proceedings.