I've long had a book goblin who moves books around. We're not visited by the sock elves much (due to my cunning plan of buying children's socks in only one colour and style, which seems to give the elves little to go on) but the cutlery elves have wrought havoc through the cutlery drawer over the years. We've restocked with teaspoons twice, and forks and spoons go awol on a regular basis. Not knives though.
Although I still maintain there are beings which exist by eating metal, I suppose I now have to admit they're not completely responsible for the depredations. We cleared one of the compost bins a week or so ago and found this:
I have had a go at cleaning it, but alas some of the plating has completely gone. Sigh. Do wonder just what else lurks in the other compost heaps, or is slowly mouldering in landfills.