Things that can get people negative trust from a DT are:
Attempted or successful fraud or theft.
Business activity that resulted in the loss of funds by others.
Account sales
Merit sales / swapping
Harassing a DT
Offering escrow without a track record
Asking for a no collateral loan
Shilling / advertising MLM or ponzi
Escrowing for themselves
Late loan repayments / loan defaults.
Any other untrustworthy or illegal behavior.