It wouldn't create a safer community like what you think OP. I guess you didn't saw what crimes is already happening while we are using crypto. this things won't end because we can not control what peoples mind, we have our own rules whether we choose bad or not and crypto is not that solution to stop it. crypto is to help us make our transaction more easier, safer environment is not really crypto will intend to do but blockchain will help us to trace all possible crimes that made by other people.