Dude, that would be* mean.* (Good idea, though!)
My grandma is the sweetest, most gentle person I have ever met, but she can *evicerate *you without ever needing to raise her lady-like voice. I’ve never seen her need to resort to rudeness-- she gets her point across, and no one ever dares argue with the gently smiling lady.
When I was a kid, she was a master of cruelty: she would look at me sadly, shake her head and say, “I’m so dissapointed in your behavior.” It had the power to reduce me to a sobbing mess. I would have rather she had beaten me, and she knew it, too! Crafty old bat.