Why would it be ludicrous? At the cost of $11 for an 8Gb flash drive, they could easily build in compressed coordinate logging for a whole lot of journeys for that money, and have them copied off with the diagnostic logs at every service, and fed back to HQ.

All they have to do is say it's for to offer a better product, for roadside rescue and aggregated into a non-personal store after 30 days, and it would probably be fine.