I clicked one of the disputed sources "1,600+ voters born 1800 and 1900 voted by mail in NC"[0] and this looks more like an error with how the age was recorded into the spreadsheet from the ballot.
E.g., there's number of outliers with the age of 267 years old. A few people aged between 240 to 255, then everyone else is 100-120 years old.
That particular list is also evenly split between dems and repubs. It also includes non-mail voters, so at a minimum the title is wrong.
