I understand that was the initial question. I am saying that is a fools errand. Anyone with a few VPSes, a calculator, and a map can do this. It isn't just ipinfo.io doing this. There are a lot of ip geolocation services.
And if you don't respond to pings, a traceroute can still be used to find the hop before yours, which will almost certainly achieve the same result for geolocation purposes.
Then there's nothing you can do. If you respond to pings, then others can take note of the responses you send.
You're missing the point that the question is effectively asking for a list of hosts that they can block.
Edit: they provided a method: https://news.ycombinator.com/item?id=37510063
I understand that was the initial question. I am saying that is a fools errand. Anyone with a few VPSes, a calculator, and a map can do this. It isn't just ipinfo.io doing this. There are a lot of ip geolocation services.
And if you don't respond to pings, a traceroute can still be used to find the hop before yours, which will almost certainly achieve the same result for geolocation purposes.