Advertising is like alcohol. Ironically, the more you consume, the less you remember. Ads are not necessarily a bad thing, neither is alcohol when consumed appropriately. The wall in the picture, though, serves as a perfect example of an advertising overkill in public areas. You may say that you know what it is like or you've seen worse. And you are right. In fact, we get randomly bombarded with ads all around the clock. Why? Simply because they are increasingly less and less effective.
Beyond sharing the same first letter, alcohol and advertising have another even more important similarity: We get used to it too fast!