Report abuse is a useful feature when users of social network platform help to report any content that violate the content policy so that admin can see it in the admin section. Then admin can check if these content is appropriate or not. On mooSocial network platform, you can find report feature on many types of content like: post, photos, videos, blogs, topics, events, groups and even profiles.
Block user is a feature that allow users of a social network platform to restrict access of other user to view their own profile or content. For example, when user A blocks user B, user B cannot view A profile and A posts on social network.