Really? Huh. No one ever told me anything like that at my workplace.
I have, however, noticed an interesting pattern. On rare occasions, when I use the allotted break time to go to the, say, a nearest pharmacy to pick up my prescriptions, my mobile phone rings and whaddaya know - it's someone from work calling me to immediately come back, chastising me for leaving the building
during the break time period, because some unexpected shit cropped up the moment I walked out of the building, and it just can't wait for me to come back on my own because it's an equivalent of a life and death emergency, which, of course, it never is, but hey - gotta make some drama to keep everyone on their toes.
Interestingly enough, nothing extraordinary happens the other 99% of the times when I skip break and remain at my desk, pressing on with work.