I agree. Advertising has gotten out of hand. It is insulting to the citizens of our society, and often outright dishonest as well. The advertising industry should be illegal.
Sometimes I see street art and I'm more mixed. But 99% of the time it's just tagging and names. If you really believe graffiti is ok then I'll be happy to come over and tag your car, your laptop, your phone, your house. No complaining if you don't like what I write or its style.