Coke Advert
I think Bansky portrayed his message in a very creative way. He used one of the biggest corporation's symbols and added his ironic twist.
I, however, do not agree with the message.  Advertisers get a bad reputation but the reality is that advertisments and selling products is necessary and vital.  No one is forcing the public to buy certain products.  Bansky is angry because he feels like people have been brainwashed but the truth is if people cannot use their cognitive functions well enough to distinguish what they do or do not need then it is hardly the advertisers fault.