Really depends on how valuable all of the staff are. I too have seen theft of small and large offices I've worked in. Personally didn't buy pens until I started working from home. I also did the accounting and budgeting for office supplies and products from the product line (beer), which sometimes had free samples taken from it. Executives loved to grab samples daily. We ensured this was added to employees paychecks as a perk for tax purposes, but not down to the individual beer. We also had talks with anyone who took over their fair share.

The cost always came down to pennies per person. Their value as a worker was typically more valuable then micromanaging them and creating an environment where they were punished. Average employee made more for the company daily then what they took home. If they knew it was fine within some limits (which most did and I would argue these Meta workers were within given their pay/value of the company), it's actually better to just ignore it.

Now the remaining employees and future employees know any mistake could cost them their job, with no major warning, just 2 strikes and your out.

When you take this personally ("violating your trust"), you end up creating a shitty place to work to soothe your ego.