Another Factor can be a 1:1 opinion rating.
People will only be able to Rate you in a Single Instance. They would have 1 opinion of you which they can change if necessary.
This is different then forums where people can jump into a thread and post numerous and conflicting things. It's not a forum at all - so ya have to disconnect from the forum way of doing things.
As it is right now... when a scammer Posts a thread... people have to jump into the thread and call the scammer out... and discredit the scammer and the thread.
On a Profile System... You have 1 profile and that's it. It either looks good or bad...
Something Like this:
