Kids compulsively tagging their zip code in other cities.

I could have taken other examples but I quite liked that one: 1026 is from a village in the countryside close to Lausanne (which is ranging from 1000-1007, 1010-1012, 1014-1015 & 1017-1018). The use of "zip code" tagged on walls is a recurring practice in occidental cities, often showing how people express their (local) identity, using a very formal identity: the zip code fixed by the State.

An intriguing example of a spatial practice, generally done by teenagers exploring Cities and feeling the need to express their feelings.