Sounds too labor intensive to me. That would take an admin... And not all of those who have passed on have been posted about, so a search would be impossible as well.

Put the person on ignore...and you won't see their posts at least?

IMO it's important to see and realize re: be reminded that we are all mortal and we have 100% chance of passing in the future.... what we do with our lives today matters... how we think and act affect how we are re: "where" we are in life when we do pass.