Not to mention it's solidly painted. [Linked Image]

Last week I had a look at the wiring at my grandmother's place in Germany. About every single screw in the apartment was loose! I spent several days opening every single switch, receptacle, plug, power strip, trailing socket,... to retighten all screws. 2 plugs were already noticeably burnt from screws that were not only loose but obviously never had been tightened at all!
Not to mention the box with double light switch and grounded receptacle with only black and grey wires inside (all black including the ground and a grey neutral)... or the brown ground wires in the bedroom...