by Crystal RoBuzzFeedBuzzFeed StaffHi, I'm Crystal, a Senior Editor based in Los Angeles and creator of BuzzFeed's "That Got Dark" newsletter. Recently, Reddit user InsaneCookies21 asked, "What celebrity is the biggest example of 'It takes 20 years to build a reputation and five minutes to ruin it'?" And, with no hesitation, people on r/AskReddit had PLENTY of responses. Here's what they said: Warning: Stories involving assault, rape, and murder ahead. 1. "Will Smith.