The irony is that a blockchain is the perfect tool to get rid of any form of money laundering: A permanent public record of each transaction. You can always run

The irony is that a blockchain is the perfect tool to get rid of any form of money laundering: A permanent public record of each transaction. You can always run a simple program that checks your financial history against a blacklist. Now the problem with such a system is also quite obvious: Money laundering poisons the whole economy. If you could follow every dollar, you would likely find out it was at some point part of the profit from a criminal operation.