Burnt myself on this in Google Maps just this week. I had an appointment in my calendar with the location set to "Dr Firstname Lastname, 123 Main St, 12345". I clicked through it into Google Maps and since it had the full address specified I just trusted it. Well, it turned out that the first result was actually an ad for a competing doctor 20 minutes in the wrong direction.
To Google's credit, they did drop the "Don't be evil" slogan many years ago...