Where was the full page add, on a website?
It was in a newspaper, mentioned right there in the title!
If the banks start feeling afraid, you know that Bitcoin's next breakthrough is right around the corner. We could have some new age bank accepting bitcoins and challenging the cozy club that banks currently maintain. No amount of negative advertising is going to prevent that.

Banks became nervous because decentralized Bitcoin appeared, to which they have no influence, and BTC is much faster, safer and easier to use. They are aware that they can not offer what BTC offers to its customers and that in the long run they will lose this battle if they do not do something now.
Banks alone can not stop the BTC but national governments and financial institutions can, with restrictive laws and financial regulations.
I hope that such scenario will not happen.
Every man should be free to choose the financial service that suits him the best but I am afraid that national governments will try to protect their banks and financial institutions, and even go against the interests of its citizens.