Ian. Wallpaper over a receptacle to hold it in place!? [Linked Image] Well, I guess it's one elegant step up from paint or the bent nails as per your other pics!!
Retaining sockets/recepts in sheetrock is a problem here too, it being quite common for the whole shebang to come off the wall on the end of the cord cap/plug as a visual laxative. We found one here which had been plastered in absolutely solid with a great gob of "Polyfilla" [spackle?] by a French "Darwin Award" candidate.

Alan

Wood work but can't!