Why you're wasting your time and your account to do this...
Another Q : Is it possible that member from DT create his alt to give his feedback into his alt .... ?
no.
What are you talking about? It is very possible for people on DefaultTrust to give feedback to their alts (or other scamming partners). If/when scammers are able to get on DefaultTrust, then they will often give feedback to their alts in order to give them additional credibility. This has happened several times in the past. Most of the time the account in question gets removed from DefaultTrust fairly quickly as it is usually pretty obvious when this is happening.