Surface riddles

A few tags, posters, stencils, throwies, stickers, and drawings - and the resulting perception is largely of disorder, of surfaces which need cleaning and bringing back to a state of visual and material stability.

But there is a tipping point from which the tags, posters, stencils, throwies, strickers, and drawings accumulate so much, and for so long, that they become acceptable and desirable as visual and semiotic atmospheres *in particular areas*.

Many cities around the world have developed such areas for the last 20 years, and their aesthetic has arguably become generic and predictable.

Do you know where this is? (and does it matter?)