There's some good points been raised in this thread, so thank you for participating. I'll admit I picked a bit of an inflammatory title in the hope of shaking things up.
Perry Mason, you've given me something else I now need to go and (politely) chest poke some people over...
In the example I gave, which I did flesh out a bit at the bottom of page 1, I did leave out two particular facts. I didn't mention that there was, in my eyes, a way of separating the staff cadet from the cadet overnight, but that would have meant a couple of the CFAVs sharing, which they didn't want to.
I also didn't mention the sex of the staff cadet, but I'm intrigued by the general assumption that they were male. I didn't mention it because, frankly, it's not relevant.
I'd suggest this scenario is more likely to arise with females, because 1)There are likely to be less of them present, so once you've separated your fourteen male cadets from your six male staff cadets, you're starting to run out of space for your one or two female cadets and your female staff cadet, along with all your staff; and 2)some middle aged VRT officers just can't see how there could be a problem because 'they're both girls'.
I'd add that if I had a fourteen year old daughter and someone put her overnight in a room alone with an eighteen year old woman/girl I didn't know, I would throw a track. I'd be less bothered if there were several girls in the room or my daughter was going on seventeen.