"Why don't you" is a commonly used expression to suggest something to others. However, when it gets directly translated into my language, Korean, it can be a little rude and offensive, depending on the context.
For example, for a question "May I ask you where the QWERTY center is?", answering "Why don't you go to the information desk?" feels as if it was "There's where you can ask there, so do not ask me!".
So I became curious; are there any cases where "Why don't you" is offensive, in common English?