Cv if they would rather lat a hack do it the wrong way that's their choice. I don't need customers like that. I don't care what the situation is I wouldn't do it. If it goes bad you are screwed. I think tapping a 55 year old circuit and putting in a nice new gfci gives the impression that you can use the receptacle for anything and everything. Where do you other guys draw the line? Kitchen receptacles? Just branch off the closest light?