Is it possible to be removed from DT list?
Yes, That is the advantage of new DT system. You can remove anyone from DT instantly if he/she is corrupted. For example if Majority of the DT member exclude you than you will be removed from the DT list.
AFAIK, only DT1 have the power to vote on removing DT who have done stupid stuff. Even if people wants to oust a certain DT member, their votes will not matter as long as majority of DT1 voted on the inclusion of the said DT member.