They can also screw up horrifyingly in a way that will bite you a year or two down the line once someone hooks up a washing machine and refrigerator to those po

They can also screw up horrifyingly in a way that will bite you a year or two down the line once someone hooks up a washing machine and refrigerator to those power sockets and everything goes down in flames (or, more likely, just takes down every single fuse until the one out in the street).