Original link: Mysterious Blocklist Prevents Former Meta Employees From Returning / Gizmodo.
I think the story is a bit unclear.
Practically all companies will not rehire employees fired for cause.
Many companies are reluctant to rehire employees laid off as part of restructings. They could potentially hold a grudge against the company. Such rehiring often require senior management approval.
So what is the difference between Meta "ineligible for rehire" list and a policy requiing senior management approval with lots of rejections?