As far as I'm concerned any member with Hero or Legendary status who is willing to promote these scams should be hit hard with -ve Trust.
Although I agree completely with the sentiment, there's two problems with that
1) The actual criteria for leaving neg is "I strongly believe this person is a scammer". Although whoring your rep to all and sundry for some dust is unsavoury, does it qualify?
2) Retaliation from senior members who have usually picked up +ve trust along the way would wreck your trust and cred.