Many years ago, some person misconfigured their squid proxy and was hitting https://jsonip.com to the point my server at the time was turning green in the gills. I started responding with 418 "You are a tea kettle" or something like that to those specific requests. The originating dev actually paid attention to their error messages and quickly resolved their config issue. Fast forward to March this year. Some fucking…
I do agree with one of the other comments - returning something about Taiwan or Tiannenmen square may do the trick