I too see no reason why permabanned members should be able to vote, however statistically rare. To me law (or rules, if you prefer) should be based on principles, not statistics.
Same thing about inactive members. Even taking the rule of having received merit from 3 users in 3 years the total number of DT1 stays above 100.
...mainly just on the principle of preferring a larger list generally.
This is not shared by the community IMO. I have only heard complaints saying that there are too many people in DT.