Ha, I did this about 10-15 years ago at a prior company. The turnover was so high (especially in the sales staff) that there would be at least a handful of people mysteriously disappearing each week.

I automated a small newsletter called "The Weekly Diff" for a few close trusted coworkers and sent it out each Friday with a list of who's new and who was missing from the company directory. And I kept a scraped database including phone numbers in case anyone wanted to reach out to anyone after they'd been removed.

Sometimes you make the best out of a failing company culture. Kept a lot of friends that way just by reaching out with some words of support :)