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Meta Employee Deleted 9TB of Torrented Files, Adult Film Producers Claim
(torrentfreak.com)
This is a most excellent place for technology news and articles.
Tech companies, as a general rule, do not filter the internet of their employees, because those employees generally need to do a lot of stuff with the internet (or networking besides the internet) and filtering it would cause a lot of problems.
Production machines (where the data lives) can be much more restricted than work machines. Strong access controls mean that compromising a work machine doesn't give you access to production data.