Sure. I once had a so - called friend who always seemed nice in public. But behind my back, she spread rumors about me. I found out when other people started treating me differently. It was really hurtful.
It depends on a lot of factors. Maybe the animation style or the way the story is presented could give you that impression. But without more details, it's hard to say for sure.
No, it is not appropriate. Sharing such stories, even if they are fake, involves vulgar and inappropriate content that violates social ethics and moral norms.
Sure. There was once a man who thought he could fly like a bird. So he climbed to the top of a very tall tree. When he jumped, instead of flying, he landed right in a big pile of leaves that some kids had just raked up. He came out looking like a leaf monster, all covered in leaves and twigs, and his friends couldn't stop laughing at him.
Well, I know a fake friend story. My friend once had a friend, let's call him Jack. Jack would borrow things from my friend all the time, like books and CDs. He promised to return them but never did. And when my friend needed help with something, Jack would always make excuses not to be there. Eventually, my friend realized Jack was just using him and not a true friend at all.