Question: Why banks do not implement bait/decoy codes for people that are aware they are being part of a scam? Wouldn't this provide them at least more informat

Question: Why banks do not implement bait/decoy codes for people that are aware they are being part of a scam? Wouldn't this provide them at least more information about the scammer? With all the technology that's available, why is not possible to let the scammer believe that he/she is doing a real transaction but behind scenes they are being monitored/traced? I'm asking out of my ignorance on the subject.