DIY it's a strong liberty statement, that got trough last communication developments (social web, mobile phone, ...) a big impulse. There are many parallelisms between the posts made in the web, and made in the walls of our cities. With the evident distinctions of medium, the self promoted semi unknown interventions that cause questioning, are in fact a need for appropriation and space usage optimization. In a participated non institutional democratic burst, the DIY it's what can make a difference when we talk about being intelligent using earth resources.