To prevent fraud we must ensure we avoid hasty decision, research, think, observe before investing into a project or platform, also ensure you do not fill your details into unknown and unverify source. Prevent your personal data with upto date antivirus.
More precisely, what you say means that in a world where people always set rules, no administration or government can participate in this game, preventing fraud can only be an individual's act and consciousness, it's clear that we will need to learn how to identify fraud and stay away from such issues. And when it comes to perceptions of each individual, it belongs to each person's right, protecting ourselves is primarily, not protecting others, we cannot afford to pay attention or completely stop these frauds when this is a black market without rules.