"In order to be good on Twitter, you have to be authentic," he said. "But authenticity is also dangerous. It leads people to make assumptions about you. It can go bad in different ways."
Some journalists wonder if their profession is tweet-crazy
Manjoo acknowledges the negatives, but notes that "studies like this are incomplete, because they can't address two questions that are central to the debate about smartphones and parenting.
Smartphones may free Mom and Dad to do more parenting, not less