In the UK, GPS is called "satnav," or "satellite navigation system" (makes sense). Some GPS systems tell drivers of large trucks to drive through tiny towns with medieval streets. When the trucks get stuck trying to navigate unnavigable areas, especially in small towns, freakish disasters result.
Here in the US, unnavigable small town streets are less a worry than are GPS units that direct people along shortcut routes to total disaster. Just recently, two different couples were lost in western Oregon due to GPS unit disasters. Each followed GPS directions to a point where they lost their satellite signal - in frozen winter conditions.
But look at this tech blog post, which essentially makes fun of the people who are dumb enough to follow their GPS down a dirt logging road in a blizzard. It seems to lack any consideration that yes - there are people who ARE that dumb, but who might receive other warnings or have time to think twice if they were using old-fashioned road maps for navigation. Even idiots know that those dotted, spidery lines don't mean big, two-lane highways, they mean goat paths out in the wilderness. Anybody who doesn't know that is probably too dumb to live, anyway. In addition to those wandering haplessly and helplessly in the wilderness, other have blindly followed their GPS' lead into muddy open fields, rivers, and over train tracks, where they were promptly threatened by oncoming locomotives. This couple took their 11-month old daughter on a near-death ride following a precarious route mapped over the Oregon mountains.
It sounds ridiculous, but the answer for all of these problems is common sense. Don't follow GPS blindly. Use it as a help and support - but always have a paper backup, always carry basic survival supplies, and never drive into an unfamiliar road in a 2-wheel drive car and hope that you can "make it."