AFAIK, there are already cases like that back then, and we can't really tell if the account owners we're dead or not, unless it was publicly announced. In Zepher's case, even if he's still on DT, I don't think that feedbacks from the past should be remove even if the account owner or the account was dead, besides these feedbacks are just meant to be a warning for other users. Especially on cases which had a valid basis, even if it was resolve, some issues can't be denied as long as it happened.

There are many accounts here that are long gone and had left some negative or positive feedback to others, the only different thing was they're not on DT, so they're toothless, their bites are painless.

As for this line:

It wasn't a rule to follow. It depends on every person here, so even if the person was dead, the fact that they didn't remove the feedback was because of their own will, thinking and ideals. We should respect what their decision is and not totally enforce the moderation of trust here. Besides, if it happened to you, you'll do the same.