I sort of did this one year we had my cousin live in our coast house for 2 weeks for them to dogsit our labrador and to have a seaside holiday while we went to CANADA.
every thing was fine apart from we had springcleaned everywhere and left fresh flowers in the rooms.
asked her to use the OLD towels {which are blue and white stipes and red ones also they are rather tatty} for the beach.
We also have set of pale blue towels for the bathroom they are a set and luxury ones
anyway when we came home they were showing us the photos and there were ones of them on the beach wrapped up and lying on luxury towels.
she realised but said nothing and I was so shocked I didn't either.
I know it is only something small but I was annoyed.
Also they did not tidy up when they left {they are very very very houseproud} in their house.
She also invited her parents to come down her mum is VERY VERY VERY NOSEY.
A funny thing happened there though my uncle sat in the dogs chair {a very old armchair}, which is very smelly and hairy and old.
Dog has died now
so even with family it is not simple.
I could never do it with strangers, we bought new bedlinen etc for them as well.