I think these sorts of cases will be very rare, but they will probably work themselves out. As vod said, exclusions can be made for people who are no longer active
Not everyone is going to revise their trust list which we are seeing from Zepher's case.
How about this?
- You must have posted sometime within the last 30 days.
It's one of the criteria of DT1 selection. Theymos can use something like this for someone being in DT2 too. Point is if someone is not active for certain amount of time then despite being in the trust list of DT1, the user will lose their DT2 status.
This way their feedback will not reflect as trusted anymore unless they fill up the criteria again.