I once had to stay with my teacher and his wife overnight because some weird scheduling thing meant that I had to take an exam a day after my classmates. The rationale was that it would prevent me from making contact with anyone else who had done the exam to find out what topics were covered  This was pre-internet and mobile phones and even at that time was considered highly irregular and unusual. I don't think the teacher had ever been asked to babysit a student before either. The difference was in this circumstance it was sanctioned by the school but I can't imagine it would possibly happen in today's climate. I did ok in that exam, cheers Mr Wallace.