People would start blacklists of others they didn't think we're doing "enough" for their job. You'd get others sending hate tells because "we carried you". People cannot play nice together nowadays, for that reason we don't have official parsers or tools like the one you describe. PVP is different because, the theory goes, it's based on teamwork in a different way to the other instances (you can change jobs at any time if needed or act as a lookout who relays information but does minimal damage).