

Under-reporting mileage is an issue because you won’t get the recommended oil checks at the right times, which will shorten your engine life. And it would be generally concerning to the owner, right? We really do assume the odometer is mostly accurate when we’re going on trips.
So I think people would be reporting it if it were happening, but they aren’t, so it’s probably not. Of course this is speculation.
That depends how you count. Guantanamo Bay was used after 9/11 and many or most of the people who were locked up there didn’t commit any kind of crime. Although, I suppose most of them were not kidnapped on US soil, so it’s not quite the same of course.