A grassroots movement that sprang to life last month is urging bank customers to close their accounts in favor of credit unions by Saturday.
I'm not against the 99% movement (I am against the Occupy Oakland encampment).  But, I think their tactics are useless.  Protests come and go.  Vandalism can be cleaned up and repaired.  The only people the 99% protests hurt are Oakland citizens who have to funnel tax revenue into cleaning up their mess.  The 1% doesn't give a damn whether a few thousand people block the port of Oakland for a few hours.
If you really want to stick it to the big banks, hit 'em where it matters - their wallets.  I applaud what the "Bank Transfer Day" is trying to do because IT WILL change how banks treat their customers.  Bank of America didn't drop it's $5 debit card policy because a bunch of people occupied a park.  It did because the backlash from their customers was so great, they had no choice.  That's the only thing banks care about - money.  Remember, the 99% are most likely customers of the 1%.  You can vote with your wallet and make a difference.  Look into your local credit union or companies like BankSimple.com (when they launch) for alternatives to big banks.  You may end up getting a better deal and sticking it to the man.