Came across this story here, which in hindsight now is amusing but could've ended up far more serious. Basically what went down was a Nicaraguan military commander was attempting to utilize his Google-fu to discern where the borders of his country were.
Nicaraguan troops are accused of crossing the (hotly disputed) border into Costa Rica and setting up camp for the night. But the commander says it was all a mistake caused by shoddy Google Maps.
Turns out, the error was caused by incorrect border data from the State Department. In a blog post, Google says they've now corrected the error.
While I've lost track of the amount of times Google Maps have saved me from getting lost on trips, I have to say I would probably double check with other sources if my route could essentially lead me to WAR.