Just imagine that you can edit your favourite website. what it would be like, to edit the design of a website and hide the unwanted elements, permanently hiding the elements that you don’t like.(advertisements ?). It’s like applying the styles to the web. I would say that it is an IDEA.
Unfortunately after googling vigorously I found that the idea has been in implementation by userstyles.org
|website ideas (Photo credit: Sean MacEntee)|
Anyway it would be a good start-up.