How to avoid becoming the bully you hate on social media

If you're looking for a fight, there's no better place to lurk than social media. 
At its best, the digital public square can connect people whose lives — and ideas — would otherwise remain distant. At its worst, that open-ended conversation can quickly devolve into an online screaming match, no matter the subject. 
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This poses a difficult challenge for people who are passionate about their politics, causes and even ce