I thought anarchy was abt destroying the banks, not robbering them. what did they want to do with the money? to spend it while shopping? how is this anarchy?

Yes, robbing banks has a lot to do with anarchy - Anarchists carried out the very first bank robbery with fire arms and a getaway vehicle, establishing the history of modern expropriation, and have been associated with the practice ever since.

For instance, in Greece, Italy, Spain and Germany, (where there is an anarchist movement and a more developed class struggle), people understand the practice of robbing banks, for personal defiance of wage slavery, and for the benefit of the friends and family, or movement.

Giannis Dimitrakis, well known bank robber mentioned in the above text, is a committed anarchist who played an important part in the rebellions in the Greek prisons, and was also active 'outside' before he was arrested.