1. All neg trust should be based on a discussion in scam accusation board.
I can't agree with you, how would forum look if you create new topic for every ponzi and every obvious scam or cheating? We will probably miss important scam accusations. It is really not important to open scam accusation for every single scam
2. A DT member should not give neg trust for their own reasons. They must open a scam accusation and must convince another DT to give neg trust.
As far as I know they are not giving negative for their own reasons. Can you please tell us which DT gave unjustified negative trust?