In theory a good idea; in practice a fair amount of risk. Who makes the decision as to whether one party of not is a scammer? Number of posts? Someone's word who is hiding behind a username?
If you want to log names of users who receive complaints- set criteria such as:
1) Perhaps 5 or more individual user complaints.
2) Check on the complainants- Do they have a racespace name and phone number.
3) List both names; complaint on XXXXX made by ZZZZZZ, that way you are not perceived as taking sides.
Of course if there is an easy way to search all threads for a NAME, then all we would need is the search engine and a sticky thread telling new users to check for their scammer name- You could even set it up perhaps as an auto pop-up when someone logs in or tries to post.
That would save everyone from the risk - except the original poster.
Think about it and yeah I am back.
Scorp