Life is too short to remove USB safely.
But ultimately, it’s not about Facebook. Facebook could disappear tomorrow and we’d just build a new toy we couldn’t put down. A junkie doesn’t quit because one dealer gets busted.
The 30x rule is that you should invest 30 times more on training than it takes you to do the task one time. So if it takes a task 5 minutes to complete, it should cost you 150 minutes (2.5 hours) to train someone to take that task over.