theodp writes: Back in the day, leprosy patients were stigmatized and shunned, quarantined from society in Leper Colonies. Those days may be long gone, but are our mapping, GPS, and social media technologies in effect helping to create modern-day 'Leper Colonies'? The recently-shuttered GhettoTracker.com (born again as Good Part of Town) generated cries of racism by inviting users to rate neighborhoods based on 'which parts of town are safe and which ones are ghetto, or unsafe'. Calling enough already with the avoid-the-ghetto apps, The Atlantic Cities' Emily Badger writes, "this idea toes a touchy line between a utilitarian application of open data and a sly wink toward people who just want to steer clear of 'those kinds of neighborhoods.'" The USPTO has already awarded avoid-crime-ridden-neighborhoods-like-the-plague patents to tech giants Microsoft, IBM, and Google. So, when it comes to navigational apps, where's the line between utility and racism? 'As mobile devices get smarter and more ubiquitous,' writes Svati Kirsten Narula, 'it is tempting to let technology make more and more decisions for us. But doing so will require us to sacrifice one of our favorite assumptions: that these tools are inherently logical and neutral...the motivations driving the algorithms may not match the motivations of those algorithms' users.' Indeed, the Google patent for Storing and Providing Routes proposes to 'remove streets from recommended directions if uploaded route information indicates that travelers seem to avoid the street.' Even faster routes that 'traverse one or more high crime areas,' Google reasons, 'may be less appealing to most travelers'.