That's not enough... Even some of the Legendary users might turn out to be scammers [e.g. hacked accounts].
I know that's not enough. But, Sometimes it depends on the amount and purpose of the trust. For example, if a newbie or Brand new account asks to pay first even $1. I won't trust and I won't go for it. If a full member asks to pay first, First of all, I will check his trust network and feedback. If there is nothing extraordinary, I can go max $10. Of course, his account is worth more than $10 to him. I know Legendary members also can be scammers. Still, If a Legendary member has a good reputation and Strong Trust Network. I will go and do up to $200-500. I believe, He gave a lot of effort to the forum and becomes Legendary. So Legitimate Feedback can ruin all of his reputations and it's worth more than $200.
Every single feedback matters
Well, I guess, my feedback is not visible to anyone because I am not a DT. Still, I am leaving appropriate feedback if someone is interested to check untrusted feedback too.