A friend of mine had her boyfriend over when the inspectors came round. They knocked on her door whilst she and her boyfriend were having sex- when she heard the inspector say, "room inspection!" she thought it was a joke and just carried on! When they knocked again she realised that this wasn't the case, haha.
Anyway, the inspector came into her room, with my friend wearing just a towel and her boyfriend partially hidden under the covers, and left one of the 'your room is satisfactory' slips with her, and that was that. Not sure if she actually saw my friend's boyfriend (the curtains were drawn so it was dark in the room) but hey, she clearly didn't care if she did. When my friend told us all this, we couldn't believe it!