WASHINGTON — John Podesta has given it a lot of thought and believes the best way to deal with the trolls is to ignore them. His wife, Mary, however, takes a different approach. When angry people call their home in the middle of the night, she has a conversation with them. “She sits on the phone and talks to them, which is disconcerting actually to most of the people who are calling just to leave a nasty message on your voicemail,” Podesta says. “When somebody actually engages them and says, ‘Why are you doing this?’ they fold pretty quickly. But...