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This article has a good review of the map spammers and their motivations: https://sites.google.com/site/mapmakerpedia/maps-101/wiping-...

Basically any business that is aimed at homeowners, but tends to be located away from residential areas, has a big inventive to create false locations.

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I wrote that! Thanks for posting that. Here's a good article from an ex-Maps spammer, detailing how he used exploits in the Maps UI to hijack listings: http://valleywag.gawker.com/how-a-hacker-intercepted-fbi-and... Although that particular loophole is closed, there are still many ways to get spam listings on Maps.

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