Celebrities can provide a big boost to the not-for-profits they publicly support. They can also harm them by association. Accusations connected with the #MeToo movement and other scandals have brought down many stars and caused major headaches for some nonprofits. Don’t wait for a PR crisis. Include a “morals clause” in contracts with spokespeople, make a crisis plan that describes who will speak for your organization and what they’ll say, and get to know your local media when you have good news. They’re more likely to give you fair coverage when news is negative.