I agree, often sarcasm is not funny. Someone mimicked me this week, in a kind of sarcastic way. I knew what they were saying, only cry babies complain about being teased or picked on or bullied. I knew what they were TRYING to say. However, I did not buy it. I saw it, and let it go. I said nothing. I did identify it as a kind of sarcasm though, and no one laughed. No one thought of it as funny. I was glad of that!