The anonymous structure of the blockchain technology is a breeding ground for criminal activities life money laundering, drug trafficking?
I once said something like this, anonymous or not criminal does exist. In real world with identification card and cctvs criminal activities is rampant.
If youre born to be a criminal and addicted as one then you dont need blockchain technology to hide yourself. It is only you who will expose it.
Look for the biggest corrupt individuals in the world, theyre standing as public servant.