How do you prevent predatory behavior by those looking to harass or humiliate other who are in a vulnerable position? I don't think social media is an appropria

How do you prevent predatory behavior by those looking to harass or humiliate other who are in a vulnerable position? I don't think social media is an appropriate platform for those looking to truly open up and share their deepest thoughts, at least with the nature of people + anonymity + the internet. Just my gut reaction.