President Donald Trump’s most popular tweet to date is a video that shows him fake-pummeling a personification of CNN. Reality TV star Rob Kardashian was trending last week after attacking his former fiancee on Instagram in a flurry of posts so explicit his account was shut down. He continued the attacks on Twitter, where he has more than 7.6 million followers.

While public interest in bad behavior is nothing new, social media has created a vast new venue for incivility to be expressed, witnessed and shared. And experts say it’s affecting social interactions in real life.

“Over time, the attitudes and behaviors that we are concerned with right now in social media will bleed out into the physical world,” said Karen North, a psychologist and director of the University of Southern California’s Digital Social Media Program. “We’re supposed to learn to be polite and civil in society. But what we have right now is a situation where a number of role models are acting the opposite of that … And by watching it, we vicariously feel it, and our own attitudes and behaviors change as a result.” Read more.

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