Red trust doesn't always make someone a scammer, it shows that the person leaving the feedback doesn't trust the person recieving it. Lutpin has made his reasoning clear for the red mark in his feedback, as did Lauda.
Would you trust someone that spams and ban evades, along with little trustworthy things to their name?

In addition, would you not consider somebody delivering a sub-par product for what you pay to be scamming? In that case, signature spamming and getting paid is scamming the owner.

You're not in any place to insult anyone else's literacy.