even worse DIY

I know i’m bad at DIY and so do you because i told you. I was therefore heartened to see this attempt to hang a picture in the restaurant we went to this evening.
click the picture for a big version to see:
a) a rawl plug with no screw in it to the left of the hanging picture
b) a highly protruding screw in the right place to the left of the hanging picture, suggesting the hole and rawl plug were too small for the screw eventually used
c) the extra (painted) nail in the wall above the picture