Perhaps he should just blacklist anyone who keeps lauda in their trust list.
He was trying to convince others to agree with him.
All blacklisting would do is exclude someone from being DT1. He would have to completely overhaul the system to make it impossible for any DT1 member to include someone in their trust list, therefore making that person DT2.
He can blacklist on both levels, no?
Oops, I just deleted that message because I realized that if he blacklists everyone that includes you from DT1, then you would be excluded from DT2 as well. However, if he did not take that extreme measure, I believe he would have to do a tweek on the system, so if a DT1 member included someone on the blacklist, it doesn't add them to the DT2 list.