Chrissy Teigen once bullied a teen on Twitter. It's an important lesson in suicide prevention.

A decade ago, when Courtney Stodden was just a teenager, Chrissy Teigen viciously bullied Stodden on Twitter. 

Many of Teigen's replies to Stodden's tweets were mocking and cruel, asking whether the teen, who'd become famous for marrying 50-year-old acting coach Doug Hutchinson with parental consent, did drugs or had a...