You may have understood my question by looking at the above question. I have spent a lot of time since coming to this forum. Now, we are learning a lot of things. Still, we new members come to this forum and slowly learn and move forward, and then we see a lot of big rankable accounts. There are a lot of merits, but they are less active. Now, many big accounts are around, but we newbies need help identifying which one is actually what kind of account.

Is there an organized list of reputable members in this forum? By looking at their list, newbies will understand who is in a good position and doing good things in this forum. If there is a post like this, please show it and help.

The extension activates when you browse BitcoinTalk.org pages such as threads or user profiles and inserts additional info about BitcoinTalk users and additional controls.

I want to know more, so I asked the following questions:

Who are the members of DT1 and DT2? What are the functions of DT1 and DT2 members? Why are DT1 and DT2 kept even though every thread in the forum has moderators, and what are their requirements?

What is DT?
DT stands for DefaultTrust. Well, in fact, DefaultTrust is an account of the forum managed by admin. In your trust list, DefaultTrust is trusted by default. You can include/exclude anyone from your trust list though.
So, we got what is DT 0, you can also say list of people whom you trust.

Now, if DefaultTrust includes you on his trust list, you will be DT-1 member. If any DT-1 member includes you in his trust list, you will be DT-2 member.
If theymos wants to include someone to DT-1 list, theymos includes that person in DefaultTrust’s trust list.
Now, if DT-1 members include someone in his/her trust list, that person becomes DT-2. I have already used an example. Again, for example, a DT-1 member has included user ‘X’ in his trust list, so he/she becomes DT-2 but if another two DT-1 members exclude ‘X’ from his trust list, ‘X’ will no longer be in DT-2.

Feedback
Since you are trusting DefaultTrust by default, you are trusting all the DT-1 ad DT-2 members by default. It’s simple, if you trust your friend, and your friend trusts another guy, logically you are trusting that another guy.
But you can still exclude a member from your trust list. For example, you don’t trust DT-1 member ‘X’, go to your trust setting. In the box write tilde (~) and the DT-1 member name whom you don’t want to trust. It’s like {~X}. Or, if you don't want to trust anyone, simple put ~ before DefaultTrust.
Now if user DT-1 member 'X' gives someone a feedback, you will not see it by default.

Summary:
In trust setting, all those are mentioned as below-
Depth 0, the list of people who are included in your trust list.
Depth 1, the list of people who are trusted by Depth 0.
Depth 2, the list of people are trusted by Depth 1.