The sign buildings

The sign buildings In seoul, The building is plastered a number of the signboards. Because of their too intensive colors, huge size of letters, and other many things,  people don't feel it's looks good. However, Now, Seoul's scenery have been changed! You may be heard about 'The business of design Seoul '. Do you know about that? I'll introduce it. It's the policy that  made Seoul to the place where people want to visit and live in the most. The plans : setting 'Design streets of Seoul' is one of their works. Trough the 'total design' of  Public structure and the signboards, they expect to be harmony in Seoul's streets. The guideline of that plan is to avoid intensive colors and too complicated shapes, choose consistant designs, and so on. many public structures have been changed to following them. Look at that pictures, (left one is before, and right one is after)     what do you think about it? Do you think many things are changed?For me, It seems to be more nice to look.Of couse, These change is Not only Seoul, But also many other cities.Seoul's streets had a lot of 'sign building' in a few years ago, Now, many of them was replaced and it's still on going.Therefore, In the near future, I guess, they will be no eyesores in Seoul. On the other hand, In advertisment, It is different matter.The purpose of the advertisment  is to promote.It must can be eye-catching and in order to that, they have to be unique!So, In my opinion, regulating advertisment is paradoxical!It is obvious that they are one of the main cause of hurting urban landscape, but how can we control advertisment?I thought it, but I have no idea to regulate them...... I want to know others oppinion.