The vicious neighbor set four rules for his pregnant wife in the group: no mobile phones, no noise, and even asked us to "humanely handle" pets. When the whole building was furious, I silently wrote down his house number. He thought he was fighting a keyboard warrior, but little did he know that on the other side of the network, I was wiping the blade of my knife. After all, for a bad murderer, these unreasonable demands were a perfect "hunting license."