In general, it would be good to make a global grid, the entrance to which would be a check at once. If there were dark things behind you, you could not even enter into this ecosystem. Then with the scammers, no one would have come across in most cases. But such a system is likely to immediately deprive any anonymity in the network ..
This is already an ideal world, more like futuristic essays by science fiction writers. Always crypto community will be divided into those who will be in the light and those who will be in the shadows.