“When someone writes something hateful and threatening I respond with something like, "I want to be so much like you; I want to wear your skin." By messing with them in that way you change what they're selling. They won't share it. And it halts the conversation. Or I'll change it to "Jenny, you're like a rose bush that grew a watermelon." They come back pissed off and write, "I didn't say that!"”
