Check out one suggested solution to one of the issues:

In many ways, the anonymity of the Web strips individuals of the coercive forces of norms and consequences that typically govern behavior. In turn, the globalized nature of the Web means it is far more likely that individuals will come into contact with those who do not share their views, experiences and narratives, creating conditions ripe for unrestrained conflict. Would Replacing Anonymity With A Single Universal Social Media ID Fix The Web’s Toxicity?