How feasible would it be for the host under measurement to introduce additional artificial latency to ping responses, varying based on source IP, in order to spoof its measured location?
You could do even cooler tricks, like https://github.com/blechschmidt/fakeroute
Pointless? Almost certainly.
I wonder if this thing will start a cat and mouse game with VPNs.
[1]: https://old.reddit.com/r/networking/comments/1hkm4g/lets_tal...
Oversubscription is expected to a certain degree (this is fundamentally the same concept as "statistical multiplexing"). But even oversubscription in itself is not guaranteed to result in bufferbloat -- appropriate traffic shaping (especially to "encourage" congestion control algorithms to back off sooner) can mitigate a lot of those issues. And, it can be hard to differentiate between bufferbloat at the last mile vs within the ISP's backbone.
Aha, that's what you would think, but what if I fake the source of the IP used to do the geolocation ping instead!