By Tanner Garrity There was a profile from The New York Times a few years back, which investigated a shocking hypocrisy: Silicon Valley executives don’t let their kids use smart devices. A good deal of that insider information came from Silicon Valley nannies, who know the rigors and rules of those households better than anyone else, but some higher-ups had little problem volunteering details themselves. Athena Chavarria, who worked as executive assistant at Facebook before heading Mark Zuckerberg’s philanthropic arm, said at the time: “I am convinced the devil lives in our phones and is wreak…