Just dug out this old thread as I remembered what might happen with old shaver sockets...
They have been used in Austria and Germany too as outlets in bathrooms were banned here too until I guess the 1970s. The Austrian version used boxes similar to US boxes with screws at the top and bottom, large enough to fit a modern double Schuko socket. Of course as the shaver sockets were classified "protected by isolation transformer" no ground wire was run to the socket. Now guess what happens if someone decides to replace the shaver socket with Schuko... found this at a friend's place.
My grandmother's place (bathroom rewired around 1980) was even weirder - it had a shaver socket and regular Schuko sitting side by side... kinda defying the point of the shaver socket I guess. On the other hand, the whole place was wired by complete morons, so why wonder? Missing grounds throughout, scorch marks in about any junction boxes, wires all colors of the rainbow strewn around at random... like the pipe with a red ground wire and the red phase... (the old black/grey/red system allowed red to be used for both purposes, but not simultaneously of course).