Seen on FB

But would that disrupt their lives Pamela?
Put fish inside the hollow bit of the curtain rail (I read that some disgruntled holiday home renter did that)

Well you have all thought of nasty things.
I’d clean their bathroom.???

Turn all their books on the bookshelves the wrong way around, so that they can’t see the titles and authors. But I do like Chewbaccas!

Pull the labels off all the tins and packets in the pantry

Go into their wardrobes and shorten the lengths of trouser legs and the sleeves on shirts and blouses.

Take the light bulbs out and hide them

Set the all clocks back one hour.