I won’t interrupt. I wouldn’t want you to think I’m actually listening.
When someone is talking at you rather than with you.
Chinese original
我不打断你,我怕你以为我在认真听。
Why it works
The reason given for staying silent is the insult. Politeness becomes evidence of disinterest, which is harder to answer than an open interruption.
Original source unverified; not attributed to a historical author.