However, Bank of America may not have faced too great a problem with the latest robbery attempt on one of their Chicago branches, when a 79-year-old woman carrying a plastic toy gun demanded that cashiers hand over the money.
The bank's staff were at first alarmed by the woman, Melvena Cooke, waving the gun whilst wearing sunglasses, a trench coat, and a plastic sun visor which read "princess".
However, they were able to sound the alarm, alerting police who promptly arrested her.
According to reports, the entire event had passed off quietly, not least because Ms Cooke had informed the cashier that she had had recent dental work done, and was currently unable to shout.
She faces charges of attempted robbery, and could face up to 20 years behind bars if found guilty.