It's really easy to make phones spoof their location, so it would work for stealth turfing, but I'm not sure how feasible it is to do it via software that would keep updating the spoofed location by e.g. following a GPX route at x mph.I do wonder about that, but just how could someone fake it. A drone with their phone attached? It'd make some of the zones near me an awful lot easier to get to.
My average speed's atrocious when I'm going through zones - 28 miles today at 10mph.
At the end of the day it's an excuse to get out and in that context cheating seems daft