Hope this helps a few people out not getting scammed. This is how i analyze scam risk:
1. Trust scoreIf the user has RED trust and/or open scam reports <-- Red Flag
Anyone can come up with valid scam accusation if he has valid proofs against the accused. Trust ratings/score shouldn't be a factor to consider whether a scam accusation is valid or not. I though get it that most of the negative users come up with baseless accusation and troll in the section but that doesn't means that every scam accusation coming out from a negative user should be neglected.
Its great that someone is coming forward to make people aware and advice what to do in such situations.

Trust score does give a general idea though and its up to the user to have some common sense and read what the ratings are for.
You are right though, this is not always a negative factor.