Notwithstanding the write-itself scandal of a "privacy-champion spying on employees and cracking down on their communications" angle, you won't be able to enfor

Notwithstanding the write-itself scandal of a "privacy-champion spying on employees and cracking down on their communications" angle, you won't be able to enforce anything on personal devices congregating on off-company platforms and being spread by word of mouth (or company email, if they are feeling saucy)