If someone posts your copyrighted work on Pinterest without permission, you have a formal process to get it removed; equally, if your content is wrongly taken down, you can file a counter-notice to have it restored.
By using Pinterest, you grant the platform a wide-ranging license to use, display, and distribute your photos and content across their services. US users are subject to mandatory arbitration and cannot join class action lawsuits against Pinterest, which significantly limits legal recourse. You can opt out of the arbitration clause by sending written notice to Pinterest within 30 days of first accepting these terms.