Well of course . . they can't spend to much time at one empty lot . . then they'll have to end up paying property taxes on it after their "Squatter's rights" have expired.
First of all regarding your Google Earth comment do you honestly think Google has a live feed all over the earth non stop ? That being the case that obviously they don't. That picture that you looked at from Google Earth was most likely taken along time ago. The Google Earth picture of my house has no drive way and it's not fully complete yet. That was over 5 years ago. I rest my case