Bansky, is an English based graffiti artist/political activist etc. How do I know all that? Advertising. The same Bansky just came out with this work, that basically goes against advertisers. I believe you can at least relate to the paradox here. Correct me if I am wrong but advertising has many forms, one being has been used by Bansky to "advertise" his anti-advertising work.
Now, there is no doubt that Bansky is extremely talented and has a lot of real social messages, but using advertising to promote an anti advertising message seems to me a bit, well... off the wall