A simple question: why do “ravers” in free parties – or as they name themselves “teufeurs” – all wear military or workers’ clothes? That is to say what is the function of such a sign and what are they trying to do with this sign? We think that they are making, here, a misappropriation in a sort of “agonistic” game or semiotic guerilla in which they ape control, authority, uniformity, automation, alienation and power like the “hardcore” sound of the underground techno apes the “Machine” and leads it to its symbolic destruction. In the “audio-tactile” kindergarten of the digital revolution, some young people behave like semiotic terrorists misappropriating the prevailing significances that they use to swallow all the time from the medias, from all the screens and loud-speakers connected to their bodies in which Control hypnotise them; in one hand, this misappropiation is an ecological way of living in the “second nature” (W. Benjamin), a way to reappropriate this world that has been stolen from us.