Online, it is not always clear with whom we are writing, for example on social media or in gaming chat. This can be fatal, especially for children and young people, because not all chat contacts just want to talk casually. Initially trusting conversations can develop into dangerous situations. Sexual harassment and abuse often happen online and are usually initiated in the chats of popular platforms and networks. This poster can be used to sensitise children and young people to warning signals that something is wrong. In this way, they can be prepared for unpleasant chat situations and learn to break off assaultive chat communication at an early stage. In addition, children and young people learn where they can find help and what they can do if they are confronted with sexual harassment.