There will inevitably be accounts that are abandoned, and as people die or no longer actively use their accounts for other reasons, under the present mechanism witness votes or automated voting will remain in effect.

The only means I can see of addressing this distortion of governance affecting witness votes is to require current action to effect such votes (regarding automated voting otherwise, I submit this proves automated voting deprecates humanity, because automated algorithms are immortal and people die, at the very least.  Therefore only human beings should be permitted to vote manually or society becomes a mechanism subjugating actual people by devices), at least periodically.