The person that has cached the threads is the issue which is a secondary point to bring up should a thread like the 2 mentioned be cached and available for any one to see.
Both threads are certainly wrong. So is saving a wrong thread in a cache wrong?
I would say yes it is. But I am just a guy typing on my keyboard in New Jersey .
Actually preserving the evidence is a good thing. In the unlikely event that this scammer ever comes to the attention of the authorities, the cached post is just another little piece of evidence that can ensure a conviction.