Action show or point out publicly to someone, put into evidence. For the slang comes from the Genoese scracce ( portrait or photograph of face ) and " borrachas " used as " face " ( in general, suggesting that it is ugly ) " war " It is also exposing an offender at the police photo that can be identified more easily. We talk today about " escrache " When doing a public demonstration in the home or workplace where someone is who wants to denounce, while justice is delayed or cannot act and it is believed necessary to draw the attention of the media upon him to avoid flight or impunity. There is a very interesting etymology posted by Danilo Enrique Noreña Benítez " 34 escracher;. See: Escracher. See: war.
Escrache is the name given in Argentina, Uruguay and Spain to a type of peaceful demonstration in which a group of human rights activists is directed to the residence or workplace of someone who wants to denounce. It's a slang word referring to a method of protest based on direct action, which aims to claims you make known to the public.