If what Lauda says about Yudai is true, then Yudai would not be a scammer.
This is completely false. By using automated translation tools to translate into languages like Japanese you are providing a sub-par translation. By doing what he is doing, he is giving a sub-par product and trying to take payment for it. That is a scam.
Regardless however, negative trust does not make you a scammer.
The only think we know with certainty about Ryland is that the account changed hands, which certainly does not make the person (currently) behind the account a scammer.
If the original owner was put onto DT and/or received trust on the forum, then only the original owner should be allowed to keep these things in tact. If the account has changed hands, it is no longer under the
person that was added to DT in the first place and is therefore not fit to be on there (unless proven otherwise). The same applies for trust.