It’s a time-honored tradition: Companies roll out a new policy, product, or promotion that customers hate, forcing a sheepish about-face. Instagram chief Kevin Systrom got a full dose of wrath on Dec. 17 when the photo-sharing site told users it had the right to sell their content to marketers. (Even the Kardashians felt violated by the new terms.) A day later, Systrom vowed to change the “confusing” language to clarify that it won’t sell photos. Embarrassing? Yes. But he’s hardly the first leader to reverse course.