Ordinary people often feel powerless to make real change — and that's where tactics such as boycotts come in. Many boycotts fizzle out with little effect, while others get results by stopping a problem or simply calling attention to an issue. Hulu is the latest to find itself in an uncomfortable spotlight as consumers call for a boycott. The streaming service is being accused of censorship and blocking Democratic campaign ads due to a right-wing bias. Will the effort gain enough steam to have an impact? Only time will tell. In the meantime, here's a look at some of the most powerful boycotts in history, going all the way back to colonial times.