Earlier quoted context omitted.
Nope. There are other mechanisms to target illegal actions, such as sending the police to arrest the person. Those actions are guarded by due process and the right to trial. Using the financial system to target people is not.
But we're not talking about "using the financial system to target people." We're talking about whether it's worthwhile to say something like "hey, maybe we will not allow legal markets for some things (say, murder) in our society" on top of "maybe we will ban make some activities crimes (say, murder) themselves." Do you believe markets for murder should be legal?
If you try to hire someone for murder, then the police will arrest you and throw you in prison.
Forcing every private company to operate as an additional police force, judge and jury is incredibly dumb and dangerous.