Revenge porn is difficult to fight. Even if you successfully get the photos pulled, it's all too easy for someone with local copies to upload them again. Facebook thinks it can help. The social network is launching tools designed to keep revenge porn offline and prevent an already bad situation from getting worse. You can report photos shared without permission, of course, and Facebook will both remove them and (typically) disable the accounts that posted them. However, the most important part is what follows next: Facebook uses photo matching to prevent people from sharing the shots again, including on Instagram and Messenger. You won't have to constantly police Facebook to make sure the images stay down.